Personality and externalizing behavior in the transition to young adulthood: the additive value of personality facets

Personality changes related to presence and treatment of substance use (disorders): a systematic review

Heavy substance use (SU) and substance use disorders (SUD) have complex etiologies and often severe consequences. Certain personality traits have been associated with an increased risk for SU(D), but far less is known about personality changes related to SU(D). This review aims to synthesize the existing literature on this research question. A systematic literature search was conducted from November 2022 to February 2023 in PubMed, EbscoHost, and Web of Science. Peer-reviewed original papers on SU(D)-related personality changes were included. Of 55 included studies, 38 were observational population-based studies and 17 were intervention studies. Overall, personality and SU measures, samples, study designs, and statistical approaches were highly heterogenous. In observational studies, higher SU was most consistently related to increases in impulsivity-related traits and (less so) neuroticism, while interventions in the context of SU(D) were mostly associated with increases in conscientiousness and self-efficacy and lasting decreases in neuroticism. Findings for traits related to extraversion, openness, conscientiousness, and agreeableness were mixed and depended on SU measure and age. Studies on bidirectional associations suggest that personality and SU(D) both influence each other over time. Due to their strong association with SU(D), impulsivity-related traits may be important target points for interventions. Future work may investigate the mechanisms underlying personality changes related to SU(D), distinguishing substance-specific effects from general SU(D)-related processes like withdrawal, craving, and loss of control. Furthermore, more research is needed to examine whether SU(D)-related personality changes vary by developmental stage and clinical features (e.g. initial use, onset, remission, and relapse).

Initiation of drug and alcohol use and personality development during adolescence

Personality traits predict both the initiation and continued usage of alcohol and drugs. Less established is if substance use is associated with subsequent changes in personality, especially during the sensitive period of adolescence. We used three approaches to disentangle selection and socialization effects to address whether substance use is associated with personality development (impulsivity, sensation-seeking, depression, self-esteem). First, we used a multi-wave longitudinal sample of adolescents ( N = 8,303) from the National Longitudinal Survey of Youth - Child and Young Adult dataset to study the first use of several substances. Second, we used propensity score weighting to equate users and abstainers on a range of background variables. Third, we investigated changes before, during, and after initiation of substances. Overall, there was unique variability and effects in personality across time for average levels, trajectories, and magnitudes of change both between users and abstainers as well as within users of specific substances. Results suggest that initiation of substance use is associated with changes in personality; the specifics of which are largely contingent upon the substance being used. Impulsivity and sensation-seeking were the traits associated with the most change while cocaine and cigarettes were the substances associated with the greatest changes.

A cross-national examination of cannabis protective behavioral strategies' role in the relationship between Big Five personality traits and cannabis outcomes

Background: Problematic cannabis use is common among young adults across the world. However, limited research has examined whether etiological models predicting negative consequences are universal.Objective: The present study examined whether the Five-Factor Model of personality (openness, conscientiousness, extraversion, agreeableness, and neuroticism) relates to cannabis outcomes via use of cannabis protective behavioral strategies (PBS) in a cross-national sample of college student cannabis users (i.e., used cannabis in the last 30 days).Method: Participants were 1175 university students (63.27% female) across five countries (United States, Argentina, Spain, Uruguay, and the Netherlands) recruited to complete an online survey.Results: PBS use mediated the associations between personality traits and cannabis consequences, such that higher conscientiousness (β = .20), agreeableness (β = .11), and lower emotional stability [i.e., higher neuroticism] (β = -.14) were associated with more PBS use. Higher PBS use was, in turn, associated with lower frequency of cannabis use (β = -.32); lower frequency of use was then associated with fewer cannabis consequences (β = .34). This sequential pathway was invariant across sex, but not countries. Notably, there were a number of differences in links between PBS and cannabis outcomes when comparing countries (e.g., negative associations in the US sample, but positive associations in the Argentina sample).Conclusions: Cannabis PBS mediates the relationship between personality traits and cannabis outcomes, but there are nuanced differences across countries (i.e., relationship between PBS and cannabis outcomes). Overall, students that are low in conscientiousness, agreeableness, and neuroticism and/or report low rates of PBS use may benefit from cannabis PBS-focused interventions that promote utilization of PBS.

How Does Substance Use Affect Personality Development? Disentangling Between- and Within-Person Effects

Little is known about the effects of substance use on changes in broad personality traits. This 10-year longitudinal study sought to fill this void using a large, representative sample of the Dutch population ( N = 10,872), which provided annual assessments of drug use (tobacco, alcohol, sedatives, soft drugs, ecstasy, hallucinogens, and hard drugs), Big Five personality traits, life satisfaction, and self-esteem. Using multilevel models, we examined the longitudinal associations between drug use and personality both between and within persons. Results indicated that individuals with low levels of conscientiousness, life satisfaction, and self-esteem, as well as high levels of neuroticism, used more drugs on average (between-person effects). In contrast, we found little evidence for personality change following substance use (within-person effects). We discuss these findings in the context of previous empirical and theoretical work and highlight opportunities for future research.

The Big Five Inventory-2: Replication of Psychometric Properties in a Dutch Adaptation and First Evidence for the Discriminant Predictive Validity of the Facet Scales

This series of studies investigated whether the good psychometric properties of the English version of the Big Five Inventory-2 (BFI-2) could be replicated using its Dutch adaptation. Second, it aimed to further examine the predictive validity of both the Big Five domain and the more specific facet scales of the BFI-2 in a large and representative sample. Results indicated that the structure found in the English version was replicated in the Dutch adaptation. The 60-item BFI-2 was reliable at the level of both domains and facets, as were the abbreviated versions. In terms of validity, the domain scales predicted a broad range of criteria. Examination of preregistered hypotheses regarding the discriminant validity of the facets indicated that experts were able to predict which facets would be most strongly associated with specific criteria. Overall, results confirm the strong psychometric properties of the BFI-2 Big Five domain scales and indicate that theoretically identified facets can be more valid predictors of criteria than other facets of the same domain.

Personality functioning in adults with refractory epilepsy and community adults: Implications for health-related quality of life

INTRODUCTION

Prior research has shown that people with epilepsy are at risk for a poorer health-related quality of life (HRQOL). However, patients differ greatly in how well they adjust to their epilepsy. To better understand these differences, the present study examined the role of personality. More specifically, we examined mean-level differences in Big Five personality traits between adults with refractory epilepsy and a community sample and related these traits to patients' HRQOL.

METHODS

A total of 121 adults with refractory epilepsy (18-40 years old, 56% women) completed questionnaires on the Big Five personality traits, HRQOL, and seizure frequency and severity. Patients' Big Five scores were compared to those of a community sample matched on sex and age using paired samples t-tests. We conducted hierarchical regression analyses to examine associations between personality and HRQOL, while controlling for the effects of sex, age, age at diagnosis, seizure frequency, and seizure severity.

RESULTS

Patients reported higher levels of neuroticism and lower levels of openness as compared to controls. In patients, seizure severity was positively related to neuroticism and negatively related to agreeableness. Finally, patients high in neuroticism and low in conscientiousness generally reported a poorer HRQOL.

CONCLUSION

In the present study, small personality differences were observed between adults with refractory epilepsy and a community sample. Patients' personality was found to play an important role in adjusting to epilepsy, even after controlling for seizure frequency and severity. Personality assessment may help healthcare professionals in identifying patients at risk for poor HRQOL later in life.

Measurement Invariance of the Five Factor Model of Personality: Facet-Level Analyses Among Euro and Asian Americans

Relative to broad Big Five domains, personality facets provide incremental value in predicting life outcomes. Valid between-group comparisons of means and correlates of facet scores are contingent upon measurement invariance of personality measures. Research on culture and Big Five personality has been largely limited to cross-national comparisons of domains, without assessing measurement invariance across ethnoracial groups within the same country. Using the NEO Inventories, we tested facet-level measurement invariance between Euro (N = 418, 63.2% women, M_age = 18.43) and Asian Americans (N = 429, 56.6% women, M_age = 18.00). Multigroup exploratory factor analysis within a confirmatory factor analysis framework showed partial strong invariance. Assertiveness and activity did not load onto extraversion as strongly for Asian Americans. Self-consciousness showed a stronger cross-loading onto extraversion among Asian Americans than Euro Americans. Achievement striving, competence, warmth, tender-mindedness, and excitement seeking showed noninvariant intercepts across groups. Collectivistic values emphasizing interpersonal harmony and modesty should be considered when examining narrow and broad traits among Asian Americans.

Personality Functioning in Adolescents and Emerging Adults With Type 1 Diabetes

PURPOSE

Although prior research has stressed the role of personality in adjusting to type 1 diabetes, longitudinal research is lacking. The objectives of the present study were twofold: (1) to chart the development of patients' personality over a 2-year period; and (2) to examine prospective associations among personality, treatment adherence, glycemic control, and diabetes-specific distress.

METHODS

Adolescents and emerging adults with type 1 diabetes, aged 14-25 years (M_age = 18.86 years, 54% female), participated in a three-wave longitudinal study spanning 2 years (n = 560 at Time 1). Patients filled out questionnaires on Big Five personality traits, treatment adherence, and diabetes-specific distress. HbA_1c values were obtained from treating physicians. We used latent growth curve modeling to examine the development of patients' personality. Cross-lagged path analysis was performed to examine prospective associations among the study variables.

RESULTS

First, we observed mean-level increases in extraversion, agreeableness, and conscientiousness over the course of the study. Second, we uncovered bidirectional associations between personality and several important indicators of adjustment. Lower conscientiousness and higher extraversion predicted a relative decrease in treatment adherence 1 year later. Poorer treatment adherence, in turn, predicted relative decreases in conscientiousness and agreeableness over time. Furthermore, lower emotional stability predicted a relative increase in distress 1 year later. Higher distress, in turn, predicted a relative decrease in agreeableness over time. Finally, lower conscientiousness predicted poorer glycemic control 1 year later.

CONCLUSIONS

This study found young patients to move toward a more mature personality and stressed the importance of personality in adjusting to type 1 diabetes.

The role of change in self-criticism across young adulthood in explaining developmental outcomes and psychological wellbeing

OBJECTIVE

Past research has confirmed the role of self-criticism in numerous forms of psychopathology and negative interpersonal outcomes. However, the majority of these studies were cross-sectional and have not addressed the role of possible changes in self-criticism across time for future outcomes. The current study investigated the degree to which changes in self-criticism during young adulthood precede better psychological outcomes beyond the contribution of their baseline levels.

METHOD

A total of 168 Israeli emerging adults were followed for 12 years. Participants completed assessments of self-criticism at age 23, 24, 26.5, and 29, and of developmental tasks and psychological adaptation at age 35. Analyses assessed the extent to which the intercept and linear slope of self-criticism were associated with assessments of coping with age-related tasks and psychological well-being at age 35.

RESULTS

Findings indicated that decreases in self-criticism between the ages of 23 and 29 were associated with better coping with age-related task outcomes and psychological health at age 35.

CONCLUSIONS

These findings are among the first to show that decreases in self-criticism serve as important precursors of coping with age-related tasks and psychological outcomes and point to the positive contributions of changes in personality attributes for future development.

The Relationship between Defense Patterns and DSM-5 Maladaptive Personality Domains

Aim: Research has extensively examined the relationship between defense mechanisms (DM) and personality traits. However, no study to date has explored if specific defenses (alone or in combination) are able to predict dysfunctional variants of personality domains, as conceived in the alternative DSM-5 model for personality disorders. This study aimed to investigate the relationship between DMs and DSM-5 maladaptive personality domains among adults.

Materials and Methods: Three hundred and twenty-eight adults aged between 18 and 64 years old completed measures on DMs and maladapive personality domains. Regression analyses were performed to determine which DMs predicted the maladaptive personality domains of negative affectivity, detachment, antagonism, disinhibition, and psychoticism.

Results: According to psychoanalytic literature, results showed that immature defenses positively predicted maladaptive personality domain scores, whereas mature defenses were generally related with better personality functioning. Moreover, different defense patterns emerged as significant predictors of the maladaptive personality domains comprised in the alternative DSM-5 model for personality disorder.

Discussion: Our findings support the view that defense patterns represent core components of personality and its disorders, and suggest that an increased use of immature defenses and a reduced use of mature defenses have a negative impact on the development of personality.

Participation in Organized Activities Protects Against Adolescents' Risky Substance Use, Even Beyond Development in Conscientiousness

Adolescents are at a significant risk for binge drinking and illicit drug use. One way to protect against these behaviors is through participation in extracurricular activities. However, there is a debate about whether highly conscientious adolescents are more likely to participate in activities, which raises the concern of a confound. To disentangle these relationships, we tested the latent trajectories of substance use and personality across 3 years, with participation in activities and sports as time-varying predictors. We surveyed 687 adolescents (55 % female, 85.4 % Caucasian) in Western Australia schools across 3 years. At Time 1, the students were in Year 10 1 (mean age 15 years). The results showed that participation in activities and conscientiousness are related, but each uniquely predicts slower growth in substance use. Across waves, participation in activities predicted less risky substance use a year later, over and above conscientiousness development. These results suggest that there may be unique benefits of participation in activities that protect against risky substance use.