Environmental harshness and unpredictability, life history, and social and academic behavior of adolescents in nine countries

Effects of childhood environments on the discernment of health misinformation

The wide dissemination of COVID-19 and other health misinformation poses a significant threat to individuals' well-being. We investigated how two key features of childhood environments, uncertainty and harshness, influence individuals' ability to distinguish COVID-19 and other health-related truths from misinformation (i.e., accuracy discernment and sharing discernment). Across four studies (including two preregistered studies, total N = 4874), we found that greater childhood uncertainty was associated with worse accuracy discernment and sharing discernment, whereas greater childhood harshness was associated with better accuracy discernment. We also found that the associations between childhood environments and discernment were mediated by analytic thinking (Studies 1-3). Furthermore, recalling or imagining uncertain childhood events led to a decrease in sharing discernment (Study 4). These findings offer insight into how childhood environments influence the ability to discern truth from falsehood on social media later in life, which may contribute to the establishment of corresponding interventions to combat the negative impact of misinformation on public health.

Adaptation and validation of the Chinese versions of the childhood perceived poverty and wealth questionnaire(C‑CPPWQ) and the childhood perceived unpredictability questionnaire (C‑CPUQ)

BACKGROUND

Childhood subjective socioeconomic status (operational definition of harshness) and unpredictability significantly influence life history strategies and subsequent psychological and behavioral patterns. Existing research on Chinese populations has been limited by inconsistent metrics and inadequate measurement items. This study aimed to adapt and validate the Chinese versions of the Childhood Perceived Poverty and Wealth Questionnaire (C-CPPWQ) and the Childhood Perceived Unpredictability Questionnaire (C-CPUQ), addressing cultural differences and expanding measurement subjects.

METHODS

We conducted Exploratory Factor Analysis (EFA) with 493 students and Confirmatory Factor Analysis (CFA) with 1217 students to validate the factor structures. Concurrent validity was assessed using correlations with life history strategies (Mini-K) and childhood trauma (CTQ-SF) and reliability were also evaluated.

RESULTS

The C-CPPWQ's two-factor model (perceived wealth and perceived poverty) demonstrated good fit (CFI = 0.95; TLI = 0.94; SRMR = 0.05; RMSEA = 0.08) and strong internal consistency (alpha = 0.90), with significant correlations with Mini-K (r = -0.28, p < 0.001) and childhood trauma (r = 0.29, p < 0.001). The C-CPUQ's three-factor model (Unpredictability of Parenting, Unpredictability of External Environment, and Unpredictability of Daily Happening) also showed a good fit (CFI = 0.96; TLI = 0.95; SRMR = 0.04; RMSEA = 0.07) and high reliability (alpha = 0.95), with significant correlations with Mini-K (r = -0.39, p < 0.001) and childhood trauma (r = 0.72, p < 0.001).

CONCLUSIONS

The newly adapted 14-item C-CPPWQ and 16-item C-CPUQ for Chinese contexts exhibit satisfactory psychometric properties, making them valuable tools for researching and evaluating childhood adversity.

The Impact of Adverse Childhood Experiences on the Development of Adolescent Risk-Taking: The Mediating Effect of Self-Control and Moderating Effect of Genetic Variations

Risk-taking is a concerning yet prevalent issue during adolescence and can be life-threatening. Examining its etiological sources and evolving pathways helps inform strategies to mitigate adolescents' risk-taking behavior. Studies have found that unfavorable environmental factors, such as adverse childhood experiences (ACEs), are associated with momentary levels of risk-taking in adolescents, but little is known about whether ACEs shape the developmental trajectory of risk-taking. Even less research has investigated the underlying mechanisms. Drawing on the self-regulation theory, this study examined the associations between ACEs and the developmental trajectory of adolescent risk-taking. Moreover, it also explored self-control as a mediator and genetic variations as a moderator from a "gene × environment" approach. Participants were 564 Chinese adolescents (48.40% males, Mage = 14.20 years, SD = 1.52). Adolescents reported their ACEs and self-control at T1 and risk-taking three times, with a six-month interval between each time point. Adolescents' saliva was collected at T1 for genetic extraction, and polygenetic index was created based on the gene-by-environment interaction between SNPs and ACEs for self-control via the leave-one-out machine learning approach. Findings of latent growth modeling revealed that adolescents' risk-taking decreased over time. ACEs were directly and indirectly through self-control associated with high initial levels of, and a rapid decrease in, risk-taking, especially for those with a higher polygenetic index compared to those with a lower polygenetic index. Theoretically, these results suggest a tripartite model of adolescent risk-taking, such that risk-taking is the combined function of adverse experiences in early years, low self-control, and carriage of sensitive genes. Practically, intervention strategies should reduce childhood adversities, build up self-control, and consider the potential impacts of genetic plasticity.

Effects of early-life environmental stress on risk-taking tendency of adolescents in rural areas of southwestern China

Introduction

Adolescence is a critical developmental phase characterized by increased risk-taking behaviors, which are not inherently maladaptive. According to life history theory, individuals raised in harsh and unpredictable environments are more likely to adopt faster life history strategies, favoring immediate rewards over long-term benefits. Yet, limited empirical research explore the psychological mechanism about how early-life environmental stresses influence adolescents' risk-taking. In rural China, left-behind children face economic and social vulnerabilities due to parental migration to urban areas for employment. This study's first goal was to identify the specific elements of early-life environmental stresses that impact adolescents' risk-taking tendencies from a developmental evolutionary perspective. The second goal was to construct and test a synthesized model of how objective and subjective environmental stresses influence adolescents' risk-taking.

Methods

A total of 610 middle school students in rural China completed questionnaires assessing early-life environmental stresses and risk-taking tendencies. The sample included 318 left-behind adolescents, 120 single-left-behind adolescents with one parent, and 138 non-left-behind adolescents. Structural equation modeling tested the hypothesized model, examining direct and indirect effects of environmental stresses on risk-taking.

Results

Objective early-life environmental stresses, such as low socioeconomic status (SES), high mortality cues, and high mobility cues, predicted faster life history strategies, marked by shorter future orientation and increased risk-taking tendencies. Subjective perceptions of environmental unpredictability and parental warmth mediated the influence of SES on risk-taking. Biological sensitivity moderated mortality cues' influence on perceived parental warmth. Sense of control failed to mediate the relationship between early-life stresses and risk-taking. Left-behind adolescents experienced more mobility and mortality cues, perceived greater unpredictability, and reported less parental warmth than their peers. Despite no significant difference in overall risk-taking, left-behind adolescents exhibited higher health/safety risk-taking tendencies.

Discussion

This study provides a comprehensive model linking early-life environmental stresses to adolescents' risk-taking, integrating objective and subjective measures of stress. The findings offer insights into mechanisms driving risk-taking tendencies. Also, it have significant implications for developing interventions aimed at mitigating the adverse effects of early-life stress on adolescent development, particularly for left-behind children in rural China.

Sex difference in the relationship between environmental unpredictability and depressive symptom in Chinese adolescents: The chain mediating role of sense of control and fast life history strategies

BACKGROUND

Adolescents are at a high risk of depressive symptom. A substantial body of literature indicates that early environmental unpredictability (EU) significantly affects the likelihood of developing depressive symptom. However, only a few studies have focused on the mediating mechanisms underlying this relationship. Based on life history (LH) theory and the adaptive calibration model, this study constructed a chain-mediating model to examine whether the association between EU and depressive symptom among Chinese adolescents is mediated by sense of control and fast life history strategies.

METHODS

In total, 1838 Chinese adolescents (47.8 % women, mean age = 13.17 ± 0.99 years) participated in this study and responded to self-report measures of EU, fast LH strategies, sense of control, and depressive symptom.

RESULTS

(1) There were significant correlations between EU, sense of control, fast LH strategies, and depressive symptom. (2) After controlling for the effects of sex, age and socioeconomic status, EU still had a significant positive effect on depressive symptom. (3) Adolescent depressive symptom was partly influenced by EU through three different pathways: the mediating role of sense of control, the mediating role of fast LH strategies, and the chain-mediating role of both sense of control and fast LH strategies. (4) There are significant gender differences in the above chain mediation models.

LIMITATIONS

The analysis is cross-sectional, which limits causal inference.

CONCLUSIONS

These findings contribute to a more comprehensive understanding of risk factors for adolescent depressive symptom. The chain-mediating effect of a sense of control and fast LH strategies plays an important role in the occurrence of depressive symptom.

Attachment security, environmental adversity, and fast life history behavioral profiles in human adolescents

One species-general life history (LH) principle posits that challenging childhood environments are coupled with a fast or faster LH strategy and associated behaviors, while secure and stable childhood environments foster behaviors conducive to a slow or slower LH strategy. This coupling between environments and LH strategies is based on the assumption that individuals' internal traits and states are independent of their external surroundings. In reality, individuals respond to external environmental conditions in alignment with their intrinsic vitality, encompassing both physical and mental states. The present study investigated attachment as an internal mental state, examining its role in mediating and moderating the association between external environmental adversity and fast LH strategies. A sample of 1169 adolescents (51% girls) from 9 countries was tracked over 10 years, starting from age 8. The results confirm both mediation and moderation and, for moderation, secure attachment nullified and insecure attachment maintained the environment-LH coupling. These findings suggest that attachment could act as an internal regulator, disrupting the contingent coupling between environmental adversity and a faster pace of life, consequently decelerating human LH.

The reliability and validity of the brief measures of perceived childhood harshness and unpredictability: A revised Chinese version for emerging adults

BACKGROUND

Childhood harshness and unpredictability significantly shape life history strategies, as well as downstream psychological and behavioral patterns. However, prior research involving Chinese populations has suffered from inconsistent metrics and limited measurement items.

OBJECTIVE

We adapted the English version of Maranges et al.'s (2022) Harshness and Unpredictability Scale in Childhood, translating it into Chinese and assessing its reliability and validity.

PARTICIPANTS AND SETTING

Six groups of different college student samples have been collected and the Chinese version of the Harshness and Unpredictability scales has been revised in two separate studies.

METHODS

We evaluated the factor structure using both exploratory and confirmatory factor analyses, determined internal consistency, item discrimination, concurrent validity, and assessed gender measurement invariance through multiple CFAs. The test-retest reliability was subsequently established by assessing participants after a designated interval.

RESULTS

Both scales passed psychometric tests, including exploratory and confirmatory factor analyses, and exhibited strong internal consistency and item discrimination. Gender invariance in the measurements was also confirmed.

CONCLUSIONS

The Chinese version of the Childhood Harshness and Unpredictability Scale demonstrates high reliability and validity, making it suitable for deeper examinations into the relationship between early environments and life history strategies in Chinese contexts.

Adverse childhood experiences, symptoms of anxiety and depression in adulthood: Mediation role of life history strategy

Life history theory has considered the effects of childhood experiences. The present study aimed to investigate the mediating role of life history strategy and the moderating role of gender in the relationship between childhood experiences and symptoms of anxiety and depression in adulthood. In this study, 248 Iranians (including 162 females and 86 males) between 18 and 53 voluntarily participated and responded to all online questionnaires regarding the COVID-19 pandemic. The data were analyzed with SPSS and macro PROCESS. The mediation analysis results demonstrated that the life history strategy mediates the relationship between childhood experiences and symptoms of anxiety and depression. The moderated mediation analysis revealed that there were no gender differences in the moderated mediation. The results have highlighted the importance of life history strategies in the association between childhood experiences and depression and anxiety symptoms and can be considered in the design of interventions based on the prevention of people's vulnerability to mental disorders.

Family obligation in Chinese adolescents: Consequences and parental antecedents

Adolescents' family obligation is a cultural strength that shows enduring prevalence in China. Given that the meaning of family obligation has undergone rapid changes in recent decades, it is crucial to examine the role of family obligation in adolescent adjustment in contemporary China. More importantly, although past research has investigated the consequences of family obligation on adolescents' adjustment, little is known about the antecedents of Chinese adolescents' family obligation. Using a two-wave longitudinal sample of 450 Chinese adolescents (mean age = 13.78 years, SD = .71 years; 49% female) and their parents, the current research explored two questions. First, this study examined the role of family obligation in adolescents' academic achievement, externalizing problems, and internalizing problems over early adolescence. Second, this study explored the role of parents in predicting Chinese adolescents' family obligation, specifically whether parental expectations or parental acceptance was predictive of adolescents' family obligation over time. Third, this study investigated whether family obligation is an underlying mechanism between parenting and Chinese adolescents' adjustment. Results showed that Chinese adolescents' family obligation was longitudinally associated with increased academic achievement and reduced externalizing problems. Moreover, perceived parental acceptance, but not parental expectations, was longitudinally associated with Chinese adolescents' greater family obligation. Notably, family obligation mediated the longitudinal effect of parental acceptance on Chinese adolescents' externalizing problems. By studying both the consequences and antecedents of Chinese adolescents' family obligation, this study helps provide a comprehensive understanding of this cultural strength.

Negative life events and college students' adjustment: the mediating role of self-esteem and the moderating role of grade

The present research explored the relationship among negative life events, self-esteem, grade, and adjustment of college students. In total, 1,717 college students were investigated by the adolescent life events scale, Rosenberg self-esteem inventory, and Chinese college students' adjustment scale. The results showed that negative life events were negatively correlated with self-esteem and college students' adjustment. Moreover, self-esteem was positively correlated with college students' adjustment. Negative life events significantly negatively predicted college students' adjustment, and self-esteem mediated the relationship between negative life events and college students' adjustment. Grade moderated the effects of negative life events on college students' adjustment. These findings have broad implications for college students' mental health.

The Degree of Fluctuations in Maternal Depressive Symptoms in Early Childhood is Associated with Children's Depression Risk: Initial Evidence and Replication Between Two Independent Samples

Guided by life history theory, the present study examined whether the degree of fluctuations in maternal depressive symptoms in early childhood was prospectively linked to children's risk for depression. This was the first study to present preliminary evidence on this topic and replicated main findings across two large, independent longitudinal samples. Study 1 included 1,364 families where maternal depressive symptoms were longitudinally assessed at child ages 1, 6, 15, 24, and 36, and 54 months, where child depressed/anxious behaviors at Grade 1 were reported. Study 2 included 1,292 families where maternal depressive symptoms were assessed at child ages 2, 6, 15, and 24 months. At 36 months, child internalizing symptoms and inhibitory control were assessed. In Study 1, findings revealed that the degree of fluctuations in maternal depressive symptoms over 54 months was associated with higher child depressed/anxious behaviors at Grade 1, only when mothers had higher but decreasing depressive symptoms. Study 2 revealed that the degree of fluctuations in maternal depressive symptoms over 24 months was related to higher child internalizing symptoms at 36 months, for mothers whose depressive symptoms were higher but decreasing, higher and increasing, and lower and decreasing. In addition, the degree of fluctuations in maternal depressive symptoms over 24 months was related to lower child inhibitory control at 36 months, for mothers who had higher but decreasing depressive symptoms. Findings highlighted the degree of fluctuations in maternal depressive symptoms during early childhood can contribute to environmental unpredictability, which can increase children's depression risks.

Different adverse childhood experiences and adolescents' altruism: The mediating role of life history strategy

INTRODUCTION

The present study sought to investigate whether the relationship between childhood trauma, childhood socioeconomic (SES), and adolescents' altruism were mediated by their life history strategies and different adverse childhood experiences may function diversely on altruism, with two waves of data collected 6 months apart in a longitudinal design among Chinese adolescents.

METHODS

A total of 658 adolescents (Mage  = 13.51, SD = 0.73 at T1) were recruited and completed the online survey; their life history strategies were measured by the Mini-K, the Delayed of Gratification Questionnaire (DOG), and the Chinese version of the Adolescent Risk-Taking Questionnaire (ARQ-RB) together, and their altruism was collected again after six months.

RESULTS

After controlling for gender and their altruism at T1, the results showed that childhood trauma (i.e., emotional maltreatment, physical maltreatment), as well as low SES and fast life history strategy, were significantly negatively correlated with adolescents' altruism at T2. Importantly, life history strategy at T1 mediated the relationship between T1 emotional maltreatment, T1 low SES, and adolescents' altruism at T2. However, the effect of physical maltreatment on altruism was not mediated by life history strategy.

CONCLUSIONS

This study indicated that emotional maltreatment and low SES can affect adolescents' altruism by influencing the formation of adolescents' life history strategies. The findings revealed the different influences of adverse childhood experiences on adolescents' altruism, which supplied new empirical evidence for the life history theory and provided certain reference values for cultivating adolescents' altruism.

Shorter Goals for the Faster Life: Childhood Unpredictability Is Associated With Shorter Motivational Time Horizons

Models of adaptive calibration provide an overarching theoretical framework for understanding the developmental roots of psychological and behavioral outcomes in adulthood. An adaptive calibration framework was used to examine an important dimension of motivation: goal timing. Across two studies, we saw mixed support for the hypothesis that unpredictability experienced in childhood would be negatively associated with the time horizons people use to set their goals, such that people who reported experiencing more unpredictability in their childhood tended to set goals on relatively shorter time horizons. The association was observed based on independent ratings of goal timing, but not based on participants' self-reported ratings of goal timing, and was statistically mediated by people's tendency to consider the short- versus long-term future consequences of their actions. These studies isolate a key component of childhood adversity-unpredictability-potentially underlying the time horizons people use to set, prioritize, and pursue their goals.

Family support during childhood as a predictor of mate retention and kin care in adults during the COVID-19 pandemic in Brazil: an exploratory study

Introduction

Experiences during development help to explain behavior expression in adulthood.

Aims

In this study, we explored how unpredictability and harshness experienced during childhood may have impacted the occurrence of reproductive milestones in adulthood and the expression of fundamental motives related to self-protection, disease avoidance, mate seeking, mate retention, and kin care (children/family) during the pandemic.

Methods

This was an exploratory study with 438 participants. Through the administration of online questionnaires, participants were assessed and categorized based on their childhood experiences, resulting in three groups: low unpredictability, high unpredictability with family support, and high unpredictability without family support.

Results

We found that family support experienced during childhood predicts a slow life-history strategy. This involves an emphasis on growth and parenting efforts at the expense reproduction and was relevant even for participants who faced financial unpredictability. During the pandemic, we also observed that mate retention and kin care (family) motives were predominant among individuals who had greater family support during childhood.

Discussion

Overall, the findings suggest that unpredictability experienced during childhood is crucial for the development of life-history strategies and the manifestation of fundamental motives in adulthood.

Does early adversity predict aggression among Chinese male violent juvenile offenders? The mediating role of life history strategy and the moderating role of meaning in life

BACKGROUND

Adolescent aggression has long been of interest to researchers. However, few studies have examined the influencing factors and mechanisms of aggression among violent juvenile offenders. This study tests a moderated mediation model with Chinese male violent juvenile offenders as subjects. Specifically, it explores the relationship between early adversity and aggression, as well as the mechanisms of life history strategy and meaning in life in this relationship.

METHODS

A total of 537 Chinese male violent juvenile offenders completed the Childhood Environment Scale, the Life History Strategy Short Form Scale, the Aggression Questionnaire, and the Meaning in Life Questionnaire. After controlling for socioeconomic status (SES), the current cross-sectional study used structural equation modeling (SEM) to examine a moderated mediation model.

RESULTS

The results showed that life history strategy mediated the relationship between early adversity and aggression, and early adversity affected individuals' aggression by accelerating their life history strategies. The results also showed that meaning in life moderated the relationship between early adversity and life history strategy. For individuals with high meaning in life scores, the negative predictive effect of early adversity on life history strategy was stronger than that for individuals with low meaning in life scores.

CONCLUSION

The results of this study can advance the understanding of how early adversity affects aggression among violent juvenile offenders and provide theoretical support for prison staff to develop educational strategies and subsequent interventions.

Childhood environmental harshness and unpredictability negatively predict eHealth literacy through fast life-history strategy

Background

eHealth literacy-the ability to obtain, understand, evaluate, and use health information from the Internet-is important to maintaining and improving personal health. Prior research found that people differ notably in the levels of eHealth literacy, and this study tests a theoretical account of some of those individual differences. Drawing on life history theory, we propose that low eHealth literacy is partly the outcome of people adopting a resource-allocation strategy emphasizing early and fast reproduction, namely, a fast life-history strategy.

Methods

We conducted a cross-sectional survey study (N = 1,036) that measured Chinese adult respondents' eHealth literacy, childhood environmental harshness and unpredictability, and fast life-history strategy. Covariates included health-information seeking online, self-rated health, sex, age, education level, and monthly income.

Results

Supporting a life-history explanation of eHealth literacy, childhood environmental harshness and unpredictability negatively predicted eHealth literacy through fast life-history strategy and mainly the insight-planning-control dimension of it. Harshness, not unpredictability, also directly and negatively predicted eHealth literacy after fast life-history strategy was controlled for.

Conclusion

Our findings suggest that the psychological mechanisms associated with human life-history strategies produce at least some of the individual differences in levels of eHealth literacy, including those related to neuroticism, socioeconomic status, self-rated health and social capital. Thus, a possible way to increase future generation's eHealth literacy and thereby their health is to reduce the harshness and unpredictability of the environment in which they grow up, thereby making them more likely to adopt a relatively slow life-history in their adulthood.

Measuring CHAOS? Evaluating the short-form Confusion, Hubbub And Order Scale

The Confusion, Hubbub and Order Scale (CHAOS) - short form - is a survey tool intended to capture information about home environments. It is widely used in studies of child and adolescent development and psychopathology, particularly twin studies. The original long form of the scale comprised 15 items and was validated in a sample of infants in the 1980s. The short form of the scale was developed in the late 1990s and contains six items, including four from the original scale, and two new items. This short form has not been validated and is the focus of this study. We use five samples drawn from twin studies in Australia, the UK, and the USA, and examine measurement invariance of the CHAOS short-form. We first compare alternate confirmatory factor models for each group; we next test between-group configural, metric and scalar invariance; finally, we examine predictive validity of the scale under different conditions. We find evidence that a two-factor configuration of the six items is more appropriate than the commonly used one-factor model. Second, we find measurement non-invariance across groups at the metric invariance step, with items performing differently depending on the sample. We also find inconsistent results in tests of predictive validity using family-level socioeconomic status and academic achievement as criterion variables. The results caution the continued use of the short-form CHAOS in its current form and recommend future revisions and development of the scale for use in developmental research.

Childhood Environmental Unpredictability and Experimentally Primed Uncertainty in Relation to Intuitive versus Deliberate Visual Search

Visual search is an integral part of animal life. Two search strategies, intuitive vs. deliberate search, are adopted by almost all animals including humans to adapt to different extent of environmental uncertainty. In two eye-tracking experiments involving simple visual search (Study 1) and complex information search (Study 2), we used the evolutionary life history (LH) approach to investigate the interaction between childhood environmental unpredictability and primed concurrent uncertainty in enabling these two search strategies. The results indicate that when individuals with greater childhood unpredictability were exposed to uncertainty cues, they exhibited intuitive rather than deliberate visual search (i.e., fewer fixations, reduced dwell time, a larger saccade size, and fewer repetitive inspections relative to individuals with lower childhood unpredictability). We conclude that childhood environment is crucial in calibrating LH including visual and cognitive strategies to adaptively respond to current environmental conditions.

Supplementary Information

The online version contains supplementary material available at 10.1007/s12144-023-04667-1.

Mediating roles of perceived social support and sense of security in the relationship between negative life events and life satisfaction among left-behind children: A cross-sectional study

Objective

Life satisfaction is closely related to the quality of life. Previous studies showed that left-behind children have low life satisfaction levels due to their separation from their parents. Therefore, it is significant to explore the risk factors and protective factors of left-behind children's life satisfaction to improve their life quality. Therefore, the purpose of this study was to determine the mediating roles of perceived social support and sense of security in the relationship between negative life events and life satisfaction among left-behind children.

Methods

A survey was conducted on 281 left-behind children in rural Shandong, China using negative life events, perceived social support, a sense of security, and life satisfaction scales.

Results

Negative life events had a negative impact on life satisfaction (β = -0.34, p = 0.001). In addition, not only does social support mediate between negative life events and life satisfaction (β = -0.21, p = 0.001), but also in between, security (β = -0.05, p = 0.030). Moreover, social support and security act as a chain intermediary between negative life events and life satisfaction (β = -0.03, p = 0.010), with an indirect effect share of 4.76%.

Conclusion

Negative life events could directly or indirectly affect the life satisfaction of left-behind children through the chain-mediating effects of perceived social support or the sense of security alone. Perceived social support and the sense of security are two important targets for further improving the life satisfaction of LBC.

The Critical Roles of Early Development, Stress, and Environment in the Course of Psychosis

Psychotic disorders are highly debilitating with poor prognoses and courses of chronic illness. In recent decades, conceptual models have shaped understanding, informed treatment, and guided research questions. However, these models have classically focused on the adolescent and early adulthood stages immediately preceding onset while conceptualizing early infancy through all of childhood as a unitary premorbid period. In addition, models have paid limited attention to differential effects of types of stress; contextual factors such as local, regional, and country-level characteristics or sociocultural contexts; and the timing of the stressor or environmental risk. This review discusses emerging research suggesting that (a) considering effects specific to neurodevelopmental stages prior to adolescence is highly informative, (b) understanding specific stressors and levels of environmental exposures (i.e., systemic or contextual features) is necessary, and (c) exploring the dynamic interplay between development, levels and types of stressors, and environments can shed new light, informing a specified neurodevelopmental and multifaceted diathesis-stress model.

The relationship between childhood adversity and problem behavior of new street corner youth on campus: A moderate mediation model

To explore the impact mechanism of childhood adversity on problem behaviors of new street corner youth on campus, we surveyed 637 new street corner youth on campus and completed the Strengths and Difficulties Questionnaire, the Childhood Environment Scale, the Life History Strategies Scale, and the Dark Triad Scale. After controlling for gender and age of new street corner youth on campus, results revealed that childhood adversity was significantly and positively associated with problem behaviors. Mediation analysis showed that life history strategy mediated the association between childhood adversity and problem behaviors. Moreover, moderated mediation analysis further indicated that dark triad moderated the association between childhood adversity and life history strategy, as well as the association between life history strategy and problem behaviors. These findings suggest that interventions of life history strategy and dark triad may be effective means to affect problem behaviors of new street corner youth on campus.

Childhood Environmental Unpredictability and Prosocial Behavior in Adults: The Effect of Life-History Strategy and Dark Personalities

Purpose

Childhood environments have an impact on an individuals’ behavior and cognition. We explored the relationship and possible mechanisms between childhood environmental unpredictability (CEU) and prosocial behavior (PSB) in adults.

Participants and Methods

We recruited Chinese college students (N = 1035) and adopted a questionnaire survey and structural equation modeling.

Results

The results showed that CEU negatively predicted PSB in adults. Life-history strategy and dark personality chains mediated this relationship. Higher CEU facilitated faster development of life-history strategies in individuals, and dark personalities, via fast life-history strategies, further influenced PSB in adults. The mediating pathways of Machiavellianism, narcissism, and sadism were significant, while psychopathy was not. Women were more prosocial than men, and there was no sex difference in the influence mechanism of CEU on PSB.

Conclusion

This study has practical significance as it emphasizes the importance of shaping a stable childhood environment and that individuals’ prosociality can be improved by intervening in the mediation.

Children's Evolved Learning Abilities and Their Implications for Education

In this article, I examine children's evolved learning mechanisms that make humans the most educable of animals. These include (1) skeletal perceptual and cognitive mechanisms that get fleshed out over the course of development, mainly through play; (2) a high level of plasticity that is greatest early in life but that persists into adulthood; (3) remarkable social-learning capabilities; and (4) dispositions toward exploration and play. I next examine some evolutionary mismatches-conflicts between psychological mechanisms evolved in ancient environments and their utility in modern ones-specifically with respect to modern educational systems. I then suggest some ways educators can take advantage of children's evolved learning abilities to minimize the effects of evolutionary mismatches, including (1) following developmentally appropriate practices (which are also evolutionarily appropriate practices), (2) increasing opportunities for physical activities, (3) increasing opportunities to learn through play, and (4) taking advantage of stress-adapted children's "hidden talents." I argue that evolutionary theory informs teachers and parents about how children evolved to learn and can result in more-enlightened teaching methods that will result in a more enjoyable and successful learning experiences for children.

COVID-19-related stressors and depression in Chinese adolescents: The effects of life history strategies and gender

PURPOSE

The COVID-19 pandemic has changed the way people live, affecting both their physical and mental health. Adolescents are vulnerable to the stress of the pandemic, and may experience indicators of psychological distress, such as depression. This study aimed to examine the impact of COVID-19-related stressors on depression and the mediating role of life history strategies.

METHODS

A two-wave longitudinal study was conducted with 1123 adolescents (51.20% girls, M_age = 14.30) recruited from three junior high schools in the Northeastern province of China. Adolescents' life history strategies, depressive symptoms, and demographic variables were assessed at Time 1 (November 2019) and Time 2 (August 2020), and adolescents' experience of COVID-19-related stressors was assessed at Time 2. None of participants was infected by COVID-19 virus.

RESULTS

COVID-19-related stressors were positively associated with depressive symptoms at Time 2 (β = 0.08, p < 0.01), after controlling for gender, age, SES and depressive symptoms at Time 1. And life history strategies partially mediated the relation of pandemic stress to depression (indirect effect = 0.02, p < 0.05, 95% CI [0.004, 0.034]). There were no gender differences in the relations between stress on depression.

LIMITATIONS

The sample was from a district where the pandemic was not very severe, which may limit generalizability of the results.

CONCLUSIONS

This study revealed that COVID-19-related stressors may have a long-term impact on adolescents, increasing depression through speeding up their life history strategies. Interventions should focus on life history strategies, particularly cognitive style, among adolescents during and after the pandemic.

Child attachment in adjusting the species-general contingency between environmental adversities and fast life history strategies

Extrinsic mortality risks calibrating fast life history (LH) represent a species-general principle that applies to almost all animals including humans. However, empirical research also finds exceptions to the LH principle. The present study proposes a maternal socialization hypothesis, whereby we argue that the more human-relevant attachment system adds to the LH principle by up- and down-regulating environmental harshness and unpredictability and their calibration of LH strategies. Based on a longitudinal sample of 259 rural Chinese adolescents and their primary caregivers, the results support the statistical moderating effect of caregiver-child attachment on the relation between childhood environmental adversities (harshness and unpredictability) and LH strategies. Our theorizing and findings point to an additional mechanism likely involved in the organization and possibly the slowdown of human LH.

Why and how does early adversity influence development? Toward an integrated model of dimensions of environmental experience

Two extant frameworks - the harshness-unpredictability model and the threat-deprivation model - attempt to explain which dimensions of adversity have distinct influences on development. These models address, respectively, why, based on a history of natural selection, development operates the way it does across a range of environmental contexts, and how the neural mechanisms that underlie plasticity and learning in response to environmental experiences influence brain development. Building on these frameworks, we advance an integrated model of dimensions of environmental experience, focusing on threat-based forms of harshness, deprivation-based forms of harshness, and environmental unpredictability. This integrated model makes clear that the why and the how of development are inextricable and, together, essential to understanding which dimensions of the environment matter. Core integrative concepts include the directedness of learning, multiple levels of developmental adaptation to the environment, and tradeoffs between adaptive and maladaptive developmental responses to adversity. The integrated model proposes that proximal and distal cues to threat-based and deprivation-based forms of harshness, as well as unpredictability in those cues, calibrate development to both immediate rearing environments and broader ecological contexts, current and future. We highlight actionable directions for research needed to investigate the integrated model and advance understanding of dimensions of environmental experience.

Environmental harshness and unpredictability: Do they affect the same parents and children?

Differential susceptibility theory stipulates that individuals vary in their susceptibility to environmental effects, often implying that the same individuals differ in the same way in their susceptibility to different environmental exposures. The latter point is addressed herein by evaluating the extent to which early-life harshness and unpredictability affect mother's psychological well-being and parenting, as well as their adolescent's life-history strategy, as reflected in number of sexual partners by age 15 years, drawing on data from the National Institute of Child Health and Human Development (NICHD) Study of Early Child Care and Youth Development. Results indicated that mothers whose well-being and parenting proved more susceptible to harshness also proved somewhat more susceptible to environmental unpredictability, with the same being true of adolescent sexual behavior. Nevertheless, findings caution against overgeneralizing sample-level findings to all individuals.

The Mediating Role of Chinese College Students' Control Strategies: Belief in a Just World and Life History Strategy

The harshness and unpredictability of early life circumstances shape life history strategies for trade-offs between the resources devoted to somatic and reproductive efforts of individuals in the developmental process. This paper uses belief in a just world as a reflection of early environmental cues to predict an individual’s life history strategies. Research has found that belief in a just world influences life history strategies through a sense of control. However, the relationship between a sense of control and a life history strategy is flawed because influencing life history strategies should be intrinsic to control strategies rather than a sense of control. A total of 408 Chinese undergraduate students completed the Personal Belief in a Just World Scale, Mini-K Scale, and Primary and Secondary Control Scale. Structural equation modeling suggested that belief in a just world can directly or indirectly influence life history strategies through primary and secondary control strategies, respectively; there was no statistical difference in the degree of influence between the two paths. These results deepen our understanding of the underlying mechanisms in the relationship between belief in a just world and life history strategies, which can be utilized to ensure a slow life history strategy among Chinese university students in the future.

Testing links between unfavorable living conditions, fast life-history strategy adoption, and overeating: a four-wave longitudinal study

Although overeating increases risk for chronic illness and premature mortality, evolutionary life-history theorists posit that such behaviors arise as a potential outcome of using fast life-history strategies to function in environments that are harsh or unpredictable. To test this premise, we examined links between harsh, unpredictable living conditions (HULC), the adoption of fast life-history (LH) strategies, and overeating among early adolescents using a four-wave longitudinal design. Participants were 2547 Chinese adolescents (1202 girls, 1345 boys) who completed baseline questionnaires assessing experiences of HULC, preferences for use of fast LH strategies, and overeating. Measures were re-administered in follow-ups 7, 13, and 20 months later. Analyses indicated HULC predicted increased use of fast LH strategies within each gender. However, fast LH strategy adoption contributed to increases in overeating only among girls. Findings supported specific tenets of life-history theory and underscored gender as an important consideration in understanding links between living conditions, the adoption of fast LH strategies, and risk for overeating. Interventions focused on reducing poverty and increasing stable, nurturing family, and community environments may aid in reducing overeating and obesity for adolescents.

Perceptions of childhood unpredictability, delay discounting, risk-taking, and adult externalizing behaviors: A life-history approach

Guided by principles from life-history theory, theories of adaptive calibration provide an overarching theoretical framework for understanding the developmental roots of impulsivity and externalizing psychopathology. The current research provides evidence for robust associations between perceptions of childhood unpredictability, delay discounting (Studies 1a and 1b), and adult externalizing traits and behaviors (Study 2). Both associations were observed while controlling for perceptions of the harshness of childhood environments, as well as a range of demographic characteristics. The association with externalizing traits and behavior was observed over and above current mood and depressive symptoms. Study 2 also replicated a previously documented association between changes in maternal employment, residence, and cohabitation during childhood and externalizing behavior and, furthermore, suggested that this association was mediated by perceptions of unpredictability. These studies provided no evidence for links between perceived childhood unpredictability and basic forms of risk-taking (Studies 1a and 1c). This research adds to a growing body of work leveraging principles from life-history theory to demonstrate links between childhood experiences, impulsivity, and potentially debilitating forms of mental illness. This work also highlights the value of assessing people's perceptions of their childhood environments.

Cumulative Childhood Adversity and Its Associations With Mental Health in Childhood, Adolescence, and Adulthood in Rural China

Capitalizing on a 15-year longitudinal dataset of 9-12 years old children in rural China, this study adopts a life course perspective and analyzes cumulative childhood adversity and its associations with mental health problems from childhood to adulthood. Four domains of childhood life are selected to construct cumulative childhood adversity: socioeconomic hardship, family disruption, physical issue, and academic setback. Overall, cumulative childhood adversity significantly associates with children's internalizing and externalizing problems as well as adults' depression and self-esteem. However, cumulative childhood adversity has no significant relationship with internalizing and externalizing problems in adolescence. Furthermore, different domains of childhood adversity matter differently for mental health problems in different life stages. Physical issue and academic setback have the strongest association with internalizing and externalizing problems in childhood, while only socioeconomic hardship has a significant relationship with depression and self-esteem in adulthood. The relationship between cumulative childhood adversity and adult mental health problems is fully mediated by educational attainment. Finally, there is no gender difference in either the occurrence of cumulative childhood adversity or the association between cumulative childhood adversity and mental health problems.

Disease Prevalence and Fatality, Life History Strategies, and Behavioral Control of the COVID Pandemic

The COVID-19 pandemic caught the world by surprise and raised many questions. One of the questions is whether infectious diseases indeed drive fast life history (LH) as the extent research suggests. This paper challenges this assumption and raises a different perspective. We argue that infectious diseases enact either slower or faster LH strategies and the related disease control behavior depending on disease severity. We tested and supported the theorization based on a sample of 662 adult residents drawn from all 32 provinces and administrative regions of mainland China. The findings help to broaden LH perspectives and to better understand unusual social phenomena arising from the COVID-19 pandemic.

The relationship between the psychological capital of male individuals with drug abuse and relapse tendency: A moderated mediation model

This study aims to explore the mechanism of psychological capital's influence on relapse tendency of drug addicts under the COVID-19, and construct a moderated mediation model. 977 individuals with drug addiction who come from a mandatory drug rehabilitation center in China completed the Chinese versions of Psychological capital Questionnaire, the Relapse Tendency Questionnaire,the Coping Style Questionnarie and the Life History Strategy Scale.The results showed that(1) there was a significant negative correlation between psychological capital and relapse tendency;(2)positive coping style mediated the relationship between psychological capital and relapse tendency;(3) life history strategy is an important moderator between psychological capital and positive coping style.These findings help us to better understand the impact of psychological capital and positive coping style on relapse tendency.

Slow Life History Strategies and Increases in Externalizing and Internalizing Problems During the COVID-19 Pandemic

The COVID-19 pandemic is but one of many instances of environmental adversities that have recurred in human history. Biobehavioral resource allocation strategies, known as fast (reproduction-focused) versus slow (development-focused) life history (LH) tradeoff strategies, evolved to deal with environmental challenges such as infectious diseases. Based on 141 young people and their mothers observed prior to (ages 9 and 13) and during (age 20) COVID-19, we investigated longitudinal relations involving slow LH strategies. The results support the adaptive role of slow LH strategies in reducing COVID-related increases in externalizing problems. In addition, the effect of early adversity on COVID-related increases in externalizing was mediated, and the effect on COVID-related increases in internalizing was moderated, by slow LH strategies.

Neighborhood Disorder and Risk-Taking Among Justice-Involved Youth-The Mediating Role of Life Expectancy

Neighborhood disorder has been linked to perceptions of shorter life expectancies, and shorter life expectancies have been associated with greater risk-taking. Yet, no studies have combined these two pathways. Using data from the longitudinal Crossroads study, the present study assessed whether life expectancy mediates the association between neighborhood disorder and risk-taking-substance use, crime, and risky sex-among 1,093 justice-involved adolescents. Results indicate that neighborhood disorder was linked to lower estimated life expectancy which in turn related to higher rates of cigarette use, binge drinking, illicit drug use, offending, and casual sex. However, life expectancy did not explain the association between neighborhood disorder and marijuana use or inconsistent condom use.

Lower neural value signaling in the prefrontal cortex is related to childhood family income and depressive symptomatology during adolescence

Lower family income during childhood is related to increased rates of adolescent depression, though the underlying mechanisms are poorly understood. Evidence suggests that individuals with depression demonstrate hypoactivation in brain regions involved in reward learning and decision-making processes (e.g., portions of the prefrontal cortex). Separately, lower family income has been associated with neural alterations in similar regions. Motivated by this research, we examined associations between family income, depression, and brain activity during a reward learning and decision-making fMRI task in a sample of adolescents (full n = 94; usable n = 78; mean age = 15.2 years). We focused on brain activity for: 1) expected value (EV), the learned subjective value of an object, and 2) prediction error, the difference between EV and the actual outcome received. Regions of interest related to reward learning were examined in connection to childhood family income and parent-reported adolescent depressive symptoms. As hypothesized, lower activity in the subgenual anterior cingulate (sACC) for EV in response to approach stimuli was associated with lower childhood family income, as well as greater symptoms of depression measured one-year after the neuroimaging session. These results are consistent with the hypothesis that lower early family income leads to disruptions in reward and decision-making brain circuitry, contributing to adolescent depression.

Disease History and Life History Predict Behavioral Control of the COVID-19 Pandemic

It is puzzling why countries do not all implement stringent behavioral control measures to prevent the spread of COVID-19 even though preventive behaviors have been proven to be the only effective means to stop the pandemic. We provide a novel evolutionary life history explanation whereby pathogenic and parasitic prevalence represents intrinsic rather than extrinsic mortality risk that drives slower life history strategies and the related disease control motivation in all animals but especially humans. Our theory was tested and supported based on publicly available data involving over 150 countries. Countries having a higher historical prevalence of infectious diseases are found to adopt slower life history strategies that are related to prompter COVID-19 containment actions by the government and greater compliance by the population. Findings could afford governments novel insight into the design of more effective COVID-19 strategies that are based on enhancing a sense of control, vigilance, and compliance in the general population.

An evolutionary life history approach to understanding mental health

In recent years, evolutionary life history theory has been used as a heuristic framework to understand mental health. This article reviews the life history theory and its integration with mental disorders and then introduces representative research methods and related empirical studies in the field of evolutionary psychopathology. In the end, this article concludes with future directions for further research examining and developing the evolutionary psychopathological framework.

Debate: Facing uncertainty with(out) a sense of control - cultural influence on adolescents' response to the COVID-19 pandemic

The coronavirus disease 2019 (COVID-19) pandemic has brought about healthcare, economic, and psychological crises around the world. The psychological impact on adolescents is likely going to be uneven across different societies, as cultures vary in terms of their dominant learning style that may influence how people cope with uncertainty and perceive their sense of control. We postulate that for adolescents in individualistic cultures where individual learning prevails, their sense of control might be undermined by societal disease-control regulations that restrict personal freedoms, while adolescents' sense of control might increase via participating in societal preventive efforts in collectivistic cultures where social learning is more prevalent. Individual differences regarding one's sense of control would, in turn, have implications for adolescents' short-term adjustments to COVID-19-related challenges and their future development.