The Adult Prosocialness Behavior Scale: A reliability generalization meta-analysis

The Adult Prosocialness Behavior Scale (APBS) is most often used to measure adult prosociality. We conducted a reliability generalization meta-analysis to compute the average APBS reliability and examine the heterogeneity among reliability estimations and the influence of moderator variables. An exhaustive search identified 74 articles that applied the APBS with 16 items assessed on a 5-point Likert-type scale. Of these, 58 had reliability coefficients with the current data, and 76 reliability estimates were provided. Random- and mixed-effects models were used. The average reliability coefficient was .903 for Cronbach’s alpha, .896 for McDonald’s omega, and .674 for test–retest. Moderator analyses were used to create a predictive model in which the target population and study language accounted for 48.7% of the total variability among Cronbach’s alpha coefficients. Although the APBS has shown satisfactory internal consistency, it can vary as a function of several factors.

Prevalence of Parental Violence Toward Teachers: A Meta-Analysis

A growing literature on parental violence toward teachers has examined the prevalence of these incidents, yet there is considerable variation across studies. There is a need for a systematic and comprehensive review to assess the extent of parent-perpetrated violence toward teachers. Using a meta-analytic approach, we examined the prevalence of violence directed against teachers by parents and how these rates vary by reporting timeframe and type of violence. We identified 5,340 articles through our initial screening process, and our final analysis included 8 studies that met criteria for this meta-analysis. Our findings show that teachers are more likely to experience non-physical forms of violence as compared to physical violence and that rates are lower as the severity and intrusiveness of the violent act increases. Implications for research and practice are discussed.

Adverse childhood experiences and body dysmorphic symptoms: A meta-analysis

Adverse childhood experiences (ACEs) are considered a risk factor for the development of various forms of mental disorders, including body dysmorphic disorder (BDD). The aim of the present work was to examine the association between ACEs and BDD symptomatology and to identify features of studies that might moderate this association. We conducted a three-level meta-analysis of 27 articles that included 9167 participants. Results showed that the types of ACE examined (total ACE, abuse, neglect, teasing, and bullying) were positively associated with BDD symptomatology. Specifically, a low to moderate association was found for ACE overall, defined as abuse, neglect, bullying, or teasing (r = 0.289, 95% confidence interval (CI) [.240,.337), for bullying (r = 0.282, 95% CI [.206,.354]), and for abuse (r = 0.223, 95% CI [.169,.276]) were found; and a moderate to large association was found for experienced teasing (r = 0.423, 95% CI [.360,.482]). In addition, moderator analyses of the association between ACE and BDD symptomatology resulted in a predictive model in which the type of ACE, type of sample, and gender of participants moderated the magnitude of the association between ACEs and BDD symptomatology.

Prevalence and Co-Occurrence of Different Types of Body Dysmorphic Disorder Among Men Having Sex with Men

Body dysmorphic disorder (BDD) is a relatively common psychiatric condition of which the prevalence has not been fully investigated in the non-clinical population, and in particular among men having sex with men (MSM). MSM have proven to be more inclined to develop body dissatisfaction and body image disorders compared to non-MSM. Our study investigates the prevalence of BDD and the prevalence and co-occurrence of muscle dysmorphia (MD) and penile dysmorphic disorder (PDD) in a sample of 261 Italian MSM recruited online. From our data, gathered through self-report measures, the prevalence of BDD, MD, and PDD in our populations was 5.4%, 8.8%, and 4.2%, respectively. Compared to their elders, younger adults (ages 18-34) appear to be at higher risk of BDD and especially of MD. Non-significant differences have been observed for the prevalence of PDD depending on the age range. Our study shows that the risk of body image disorders among MSM is quite common, especially among young adults, and higher than what is found among heterosexual men.

Alexithymia and Adult Attachment: Investigating the Mediating Role of Fear of Intimacy and Negative Mood Regulation Expectancies

Literature suggests an association between alexithymia and insecure adult attachment, but the mediation factors involved in this relationship are under-investigated. The study was carried out to test the possible mediation roles of the fear of intimacy and negative mood regulation expectancies in explaining this relationship. A convenience sample of 258 Polish adults (mean age: 30; 45% male), completed self-reporting measures related to adult attachment (RAAS), alexithymia (TAS-20), fear of intimacy (FIS) and negative mood regulation expectancies (NMRE). The results showed that alexithymia directly and indirectly predicts insecure adult attachment. Alexithymia positively predicts the fear of intimacy, which, in turn, positively predicts insecure adult attachment. Finally, alexithymia negatively predicts NMRE which, in turn, predict insecure adult attachment. It emerges from our data that the fear of intimacy and NMRE may be mediating factors in the relationship between alexithymia and adult attachment. Limitations, future directions of research and guidance for intervention are discussed.

Homicide as a Source of Posttraumatic Stress?: A Meta-Analysis of the Prevalence of Posttraumatic Stress Disorder After Committing Homicide

There is a growing body of literature on the diagnosis of posttraumatic stress disorder (PTSD) after committing homicide that has examined the prevalence of this phenomenon among individuals who have been convicted, but these studies considerably vary. The present study was the first meta-analysis to synthesize scientific evidence regarding the prevalence of offense-related PTSD among convicted killers. A total of 691 articles were identified through an initial screening process, and the final analysis included 11 studies that met the analysis criteria. We examined the prevalence of PTSD after committing homicide and explored how these rates varied by sample type, offender type, diagnosis timeframe, and diagnosis type. Among adult offenders, the pooled prevalence was 42.6%, 95% CI [38.0%, 47.4%], for current full-criteria homicide-related PTSD and 13.1%, 95% CI [9.9%, 17.2%], for current partial-criteria homicide-related PTSD. For mixed offenders (i.e., killers and violent offenders), the pooled prevalence of current full-criteria offense-related PTSD was 33.1% (95% CI [14.1, 59.8]). Thus, we found that PTSD prevalence was higher in killers than mixed offenders, although this difference was not statistically significant. Finally, among youth mixed offenders, the pooled prevalence for current full-criteria offense-related PTSD was 5.3%, 95% CI [2.9%, 9.5%]. These findings provide evidence of the high rate of this phenomenon, especially among convicted adults.

Physical, Emotional, and Sexual Victimization Across Three Generations: a Cross-Sectional Study

Using data gathered from grandparents (G1), parents (G2), and young adults (G3), this study examines the continuity of intergenerational victimization (physical, emotional, and sexual) across three generations. The study included data from 168 participants within three generations: grandparents, G1 (19.2% male, 80.8% female, M = 78.13 years old); parents, G2 (25.5% male, 74.5% female, M = 50.13 years old); and young adults, G3 (40% male, 60% female, M = 21.10 years old). The data is analyzed at two levels: (1) bivariate analyses to address relationships between the variables studied by Spearman's correlations, and (2) a path model to examine the intergenerational abuse simultaneously considering all variables. Overall, path modeling showed that experienced abuse demonstrated continuity from G1 to G2 and from G2 to G3. Specifically, findings indicated that grandparents' physical and psychological victimization has a direct effect on parents' sexual and physical abuse victimization, respectively. Additionally, parents' physical victimization has a direct effect on young adults' psychological and sexual victimization, while parents' psychological victimization has a direct effect on young adults' physical and sexual victimization. These findings highlight the need for preventive interventions focused on breaking intergenerational cycles of abuse.

Validation of the Beliefs about Children's Adjustment in Same-Sex Families Scale in Italian University Students

Assessing attitudes toward same-sex parenting has important implications for both intervention and prevention programs designed to foster the tolerance and normality of sexual and family diversity. Few empirically validated measures of rejection of same-sex parenting have been developed. The current study examined the psychometric properties of an Italian translation of the Beliefs about Children's Adjustment in Same-Sex Families Scale, a 14-item scale distributed in two subscales that measure direct and subtle rejection toward same-sex parenting, for its use in assessing heterosexual people's attitudes toward same-sex parents in Italy. The sample consisted of 344 Italian heterosexual university students (113 men) with a mean age of 20.48 years (SD = 1.60). The results showed that the scale has a good factor structure (via confirmatory factor analysis) and satisfactory reliability and acceptable criterion-related validity. Therefore, the BCASSFS can be used to measure opposition toward gay and lesbian parenting in the Italian context.

Elder Mistreatment in an Italian Population: Prevalence and Correlates

This study aimed to examine the prevalence of elder mistreatment (EM) in an Italian population and to determine the risk factors. The sample consisted of 393 older adults (M_age = 77.07; standard deviation = 9.45) of whom 60.1% were females. The prevalence of EM was of 20.1%. Older elders who were separated, divorced, with a poor state of health, and problems of autonomy were more likely to experience EM. The most common forms of EM were physical/sexual (9.9%) and emotional mistreatment (9.9%). The most common perpetrators were paid caregivers and members of the victim's family. A path analysis model suggested that limited autonomy and poor perceived health status appeared to be predictors of EM. We conclude that the results of this study have important implications in terms of reducing mistreatment of older adults. Understanding EM is essential to promoting equality, tolerance, and supportive attitudes and developing better prevention policies and practices.

The association between muscle dysmorphia and eating disorder symptomatology: A systematic review and meta-analysis

BACKGROUND AND AIMS

Research shows inconsistent findings about the link between muscle dysmorphia (MD) and eating disorder (ED) symptomatology. The aim of this study is to synthesize the scientific evidence available on this topic, the researchers conducted a systematic review and meta-analysis.

METHODS

The literature search enabled us to identify 39 published articles, which provided 36 independent estimations of the correlation between the two variables.

RESULTS

Our analysis found a positive association between MD and ED symptoms (r₊ = .36; 95% CI = 0.30, 0.41). Moderator analyses showed that the type of sample and the tools for assessing MD and ED were statistically associated with the MD-ED effect sizes. The methodological quality of the studies exhibited a positive, statistically significant association with the MD-ED effect sizes.

CONCLUSIONS

Higher levels of MD were related to greater ED symptomatology, but several study characteristics may moderate the association between the two variables. In this study, we discuss limitations and implications for clinical practice and future research.

Parent and peer attachment as predictors of facebook addiction symptoms in different developmental stages (early adolescents and adolescents)

Facebook Addiction (FA) is a problem that concerns minors all over the world. The attachment bond with peers and parents has been proven to be a risk factor for the onset of FA. However, the family and peer group can have a different importance depending on the developmental period of the minor. This study examined the influence of peer and parental attachment on the symptoms of FA in early adolescents and adolescents to verify whether attachment to peers and parents predicts FA symptoms in both categories respectively. The sample was composed of 598 participants (142 early adolescents) between the ages of 11 and 17 years (M age = 14.82, SD = 1.52) recruited in the school setting. Multivariate multiple regressions were performed. For early adolescents the relationships with their parents influenced the levels of FA the most (such as withdrawal, conflict, and relapse), whereas peer relationships (such as, peer alienation) were the most relevant for adolescents. Our study provides support to the role of attachment to peers and parents as a risk factor for symptoms of FA. In line with developmental theories, parents and peers acquire a different weight in predicting the relationship between attachment and FA for early adolescents and adolescents respectively. Clinical implications and future research directions are discussed.

The Relationship Between Internalized Homophobia and Intimate Partner Violence in Same-Sex Relationships: A Meta-Analysis

A meta-analysis was conducted to investigate the association between internalized homophobia and intimate partner violence (IPV) perpetration and victimization in same-sex relationships. The literature search and the application of the inclusion criteria made it possible to identify 10 studies, 2 of which were excluded due to missing data. Therefore, eight studies were finally included in the meta-analysis. The results showed positive and statistically significant associations between internalized homophobia and IPV perpetration and victimization, indicating that higher levels of internalized homophobia were related to higher levels of IPV. Specifically, the pooled effect size for the relationship between internalized homophobia and IPV perpetration (all forms), it was r₊ = .147, 95% confidence interval (CI) = [.079, .214]; for the association between internalized homophobia and physical/sexual IPV perpetration, it was r₊ = .166, 95% CI [.109, .221]; p < .0001; for the relationship between internalized homophobia and psychological IPV perpetration, it was r₊ = .145, 95% CI [.073, .216]; and for the association between internalized homophobia and any type of IPV victimization, it was r₊ = .102, 95% CI [.030, .173]. Implications of these results for clinical practice and future research are discussed.

Perceived Statistical Knowledge Level and Self-Reported Statistical Practice Among Academic Psychologists

Introduction: Publications arguing against the null hypothesis significance testing (NHST) procedure and in favor of good statistical practices have increased. The most frequently mentioned alternatives to NHST are effect size statistics (ES), confidence intervals (CIs), and meta-analyses. A recent survey conducted in Spain found that academic psychologists have poor knowledge about effect size statistics, confidence intervals, and graphic displays for meta-analyses, which might lead to a misinterpretation of the results. In addition, it also found that, although the use of ES is becoming generalized, the same thing is not true for CIs. Finally, academics with greater knowledge about ES statistics presented a profile closer to good statistical practice and research design. Our main purpose was to analyze the extension of these results to a different geographical area through a replication study.

Methods: For this purpose, we elaborated an on-line survey that included the same items as the original research, and we asked academic psychologists to indicate their level of knowledge about ES, their CIs, and meta-analyses, and how they use them. The sample consisted of 159 Italian academic psychologists (54.09% women, mean age of 47.65 years). The mean number of years in the position of professor was 12.90 (SD = 10.21).

Results: As in the original research, the results showed that, although the use of effect size estimates is becoming generalized, an under-reporting of CIs for ES persists. The most frequent ES statistics mentioned were Cohen's d and R²/η², which can have outliers or show non-normality or violate statistical assumptions. In addition, academics showed poor knowledge about meta-analytic displays (e.g., forest plot and funnel plot) and quality checklists for studies. Finally, academics with higher-level knowledge about ES statistics seem to have a profile closer to good statistical practices.

Conclusions: Changing statistical practice is not easy.This change requires statistical training programs for academics, both graduate and undergraduate.

Un estudio exploratorio sobre el nivel de conocimiento sobre el tamaño del efecto y meta-análisis en psicólogos profesionales españoles

El enfoque de la Práctica Basada en la Evidencia se basa en la utilización de la investigación científica en la toma de decisiones profesionales en un esfuerzo por producir los mejores servicios posibles en la práctica clínica. El nivel de conocimiento sobre los estadísticos del tamaño del efecto y estudios de meta-análisis puede afectar a las decisiones de los profesionales y poner en riesgo la calidad de las intervenciones psicológicas. Este trabajo recoge los resultados de una encuesta on line sobre el grado de conocimiento de estos tópicos entre psicólogos profesionales españoles. La muestra estuvo formada por 77 participantes (68.8% mujeres y 31.2% hombres), con una edad media de 41.44 años (DT=9.42), y un rango de edad de 25-64 años. Los resultados sugieren que la mayoría de los psicólogos encuestados no tenían un conocimiento adecuado sobre los índices de tamaño del efecto, los estudios de meta-análisis, y los listados de comprobación de la calidad metodológica de los estudios. Por lo tanto, es necesario mejorar la educación estadística de los psicólogos, la cual podría contribuir también en la mejora de la práctica profesional.

Falacias sobre el valor p compartidas por profesores y estudiantes universitarios

Resumen La “Práctica Basada en la Evidencia” exige que los profesionales valoren de forma crítica los resultados de las investigaciones psicológicas. Sin embargo, las interpretaciones incorrectas de los valores p de probabilidad son abundantes y repetitivas. Estas interpretaciones incorrectas afectan a las decisiones profesionales y ponen en riesgo la calidad de las intervenciones y la acumulación de un conocimiento científico válido. Identificar el tipo de falacia que subyace a las decisiones estadísticas es fundamental para abordar y planificar estrategias de educación estadística dirigidas a intervenir sobre las interpretaciones incorrectas. En consecuencia, el objetivo de este estudio es analizar la interpretación del valor p en estudiantes y profesores universitarios de Psicología. La muestra estuvo formada por 161 participantes (43 profesores y 118 estudiantes). La antigüedad media como profesor fue de 16.7 años (DT = 10.07). La edad media de los estudiantes fue de 21.59 (DT = 1.3). Los hallazgos sugieren que los estudiantes y profesores universitarios no conocen la interpretación correcta del valor p. La falacia de la probabilidad inversa presenta mayores problemas de comprensión. Además, se confunde la significación estadística y la significación práctica o clínica. Estos resultados destacan la necesidad de la educación estadística y re-educación estadística. Abstract The "Evidence Based Practice" requires professionals to critically assess the results of psychological research. However, incorrect interpretations of p values of probability are abundant and repetitive. These misconceptions affect professional decisions and compromise the quality of interventions and the accumulation of a valid scientific knowledge. Identifying the types of fallacies that underlying statistical decisions is fundamental for approaching and planning statistical education strategies designed to intervene in incorrect interpretations. Therefore, the aim of this study is to analyze the interpretation of p value among college students of psychology and academic psychologist. The sample was composed of 161 participants (43 academic and 118 students). The mean number of years as academic was 16.7 (SD = 10.07). The mean age of college students was 21.59 years (SD = 1.3). The findings suggest that college students and academic do not know the correct interpretation of p values. The fallacy of the inverse probability presents major problems of comprehension. In addition, statistical significance and practical significance or clinical are confused. There is a need for statistical education and statistical re-education.

Effect size and meta-analysis in Spanish professional psychologists

The Evidence-Based Practice approach is based on the use of scientific research in decision-making in an effort to produce the best possible services in clinical practice. The knowledge level about effect size statistics and meta-analysis studies may affect the decision soft professionals and jeopardize the quality of psychological interventions. This paper presents the result so fan on-line survey on the degree of knowledge of these topics among Spanish practitioner psychologists. The sample consisted of 77 participants (68.8% women and 31.2% men), with a mean age of 41.44 years (SD=9.42), with age range of 25-64 years. The results suggest that most of the psychologists survey eddid not have adequate knowledge about effect size index, meta-analysis studies, or methodological quality checklists. It is therefore necessary to improve the statistical education of practitioner psychologists, which might also contribute to their provement of professional practice.

Factorial Invariance of the Scale Beliefs About Children’s Adjustment in Same-Sex Families in Spanish, Chilean, and Hispanic University Students

This study examines the factorial invariance of the Scale on Beliefs About Children’s Adjustment in Same-Sex Families (SBCASSF) across countries in three samples: Chilean, Spanish, and Hispanic university students. The scale analyzes attitudes toward the consequences of the rearing and education of children by parents with a homosexual sexual orientation. The instrument consists of two subscales: Individual Opposition and Normative Opposition. The Spanish sample is composed of 199 university students, the Chilean sample is made up of 279 students, and the Hispanic sample consists of 114 students. The results provide empirical evidence for the reliability of the SBCASSF in the samples from the countries and its factorial invariance (strict invariance). Results are also provided about differences between countries and by sex. The SBCASSF could be a potentially useful measure for educators, psychologists, and other mental health professionals who wish to study beliefs about the child-rearing practices of same-sex parents.

Interpretation of the p value: A national survey study in academic psychologists from Spain

BACKGROUND

Incorrect interpretations of p values affect professionals&rsquo; decisions and jeopardize the quality of psychological interventions and the accumulation of valid scientific knowledge. This study analyzes the errors made by Spanish academic psychologists in interpreting p values.

METHOD

We surveyed academic psychologists about their interpretations of p values. The sample is composed of 418 academic psychologists from Spanish public universities. The mean number of years working as a university professor is 14.16 (SD = 9.39).

RESULTS

Our findings suggest that many academic psychologists do not know how to correctly interpret p values. The inverse probability fallacy presents the greatest comprehension problems. Methodology instructors also interpret the significance of the p value erroneously.

CONCLUSIONS

These results highlight the importance of the statistical re-education of professors.

Spanish Validation of the Polymorphous Prejudice Scale in a Sample of University Students

The shortened version of the Polymorphous Prejudice Scale (PPS) analyzes new manifestations of prejudice toward gay men and lesbian women. Specifically, this instrument consists of 16 items distributed in four subscales: values gay progress, positive beliefs about gay men, positive beliefs about lesbian women, and resistance to heteronormative expectations. The aim of the current study is to add new evidence about the reliability and validity of the scale. The scale is administrated to 348 heterosexual university students from Spain with a mean age of 22.62 years (SD = 7.63). Reliability and factorial validity estimates are presented. A four-factor structure is supported using confirmatory factor analysis (short version). Our results can be useful in planning variables for intervention programs designed to foster the tolerance and normality of sexual diversity.

Knowledge level of effect size statistics, confidence intervals and meta-analysis in Spanish academic psychologists

BACKGROUND

The statistical reform movement and the American Psychological Association (APA) defend the use of estimators of the effect size and its confidence intervals, as well as the interpretation of the clinical significance of the findings.

METHOD

A survey was conducted in which academic psychologists were asked about their behavior in designing and carrying out their studies. The sample was composed of 472 participants (45.8% men). The mean number of years as a university professor was 13.56 years (SD= 9.27).

RESULTS

The use of effect-size estimators is becoming generalized, as well as the consideration of meta-analytic studies. However, several inadequate practices still persist. A traditional model of methodological behavior based on statistical significance tests is maintained, based on the predominance of Cohen&rsquo;s d and the unadjusted R2/&#951;2, which are not immune to outliers or departure from normality and the violations of statistical assumptions, and the under-reporting of confidence intervals of effect-size statistics.

CONCLUSION

The paper concludes with recommendations for improving statistical practice.

Misconceptions of the p-value among Chilean and Italian Academic Psychologists

Common misconceptions of p-values are based on certain beliefs and attributions about the significance of the results. Thus, they affect the professionals' decisions and jeopardize the quality of interventions and the accumulation of valid scientific knowledge. We conducted a survey on 164 academic psychologists (134 Italian, 30 Chilean) questioned on this topic. Our findings are consistent with previous research and suggest that some participants do not know how to correctly interpret p-values. The inverse probability fallacy presents the greatest comprehension problems, followed by the replication fallacy. These results highlight the importance of the statistical re-education of researchers. Recommendations for improving statistical cognition are proposed.

Intimate Partner Violence in Self-Identified Lesbians: A Systematic Review of Its Prevalence and Correlates

This article presents the first systematic review on intimate partner violence (IPV) in self-identified lesbians in same-sex couples. Studies published from January 1990 to December 2013 were analyzed. Of the 687 studies reviewed, 59 were preselected, of which 14 studies were selected that met the inclusion and methodological quality criteria. A summary is presented of the characteristics of the studies, the participants, the prevalence of IPV victimization and perpetration, and its correlates. All the studies were carried out in the United States and used a nonprobabilistic sampling method. The majority of participants were White with a high educational level. The results indicate that all the forms of violence occur, but the most prevalent is emotional/psychological violence. The correlates positively associated with IPV are certain personality characteristics, fusion, previous IPV experience, a family history of violence, and alcohol consumption. This review finds significant limitations in the analyzed literature. Methodological recommendations are made for future studies.

Etiology of homosexuality and attitudes toward same-sex parenting: a randomized study

Attribution theory suggests the hypothesis that heterosexuals' attitudes toward homosexual sexual orientation will be more negative when homosexuality is attributed to controllable causes. Our randomized study analyzed (a) whether beliefs about the genetic or environmental etiology of the homosexual sexual orientation can be immediately modified by reading a text and (b) the causal effect of attributions about the controllability (environmental etiology) or noncontrollability (genetic etiology) of homosexual sexual orientation on the rejection of same-sex parenting and their social rights. The sample was composed of 190 Spanish university students with a mean age of 22.07 years (SD = 8.46). The results show that beliefs about the etiology of the sexual orientation could be modified by means of a written text. Furthermore, participants who believed that sexual orientation had a genetic etiology showed greater support for social rights and less rejection of same-sex parenting. However, the effects were detected only when there was a traditional opposition to the family with same-sex parenting. When the opposition was normative, the effect was not statistically significant. Our results can be useful in planning variables for intervention programs designed to foster tolerance toward and normality of sexual diversity.