Genetic and environmental bases of childhood antisocial behavior: A multi-informant twin study.

Genetic and environmental influences on childhood antisocial and aggressive behavior (ASB) during childhood were examined in 9- to 10-year-old twins, using a multi-informant approach. The sample (605 families of twins or triplets) was socioeconomically and ethnically diverse, representative of the culturally diverse urban population in Southern California. Measures of ASB included symptom counts for conduct disorder, ratings of aggression, delinquency, and psychopathic traits obtained through child self-reports, teacher, and caregiver ratings. Multivariate analysis revealed a common ASB factor across informants that was strongly heritable (heritability was .96), highlighting the importance of a broad, general measure obtained from multiple sources as a plausible construct for future investigations of specific genetic mechanisms in ASB. The best fitting multivariate model required informant-specific genetic, environmental, and rater effects for variation in observed ASB measures. The results suggest that parents, children, and teachers have only a partly "shared view" and that the additional factors that influence the "rater-specific" view of the child's antisocial behavior vary for different informants. This is the first study to demonstrate strong heritable effects on ASB in ethnically and economically diverse samples. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Gender differences and developmental change in externalizing disorders from late adolescence to early adulthood: A longitudinal twin study.

Using data from over 1,000 male and female twins participating in the Minnesota Twin Family Study, the authors examined developmental change, gender differences, and genetic and environmental contributions to the symptom levels of four externalizing disorders (adult antisocial behavior, alcohol dependence, nicotine dependence, and drug dependence) from ages 17 to 24. Both men and women increased in symptoms for each externalizing disorder, with men increasing at a greater rate than women, such that a modest gender gap at age 17 widened to a large one at age 24. Additionally, a mean-level gender difference on a latent Externalizing factor could account for the mean-level gender differences for the individual disorders. Biometric analyses revealed increasing genetic variation and heritability for men but a trend toward decreasing genetic variation and increasing environmental effects for women. Results illustrate the importance of gender and developmental context for symptom expression and the utility of structural models to integrate general trends and disorder-specific characteristics. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Heterosexual risk behaviors in at-risk young men from early adolescence to young adulthood: Prevalence, prediction, and association with STD contraction.

Health-compromising lifestyles involve stable patterns of behavior and are associated with high-risk social environments and accelerated developmental trajectories. Developmentally, antisocial behavior is associated with such lifestyles. Mediational models predicting a measure of lifetime average sexual risk behavior assessed over a 10-year period (from ages 13-14 to 22-23 years) were examined for a sample of at-risk young men. The measure included years of abstinence from intercourse as well as levels of 3 key heterosexual indicators of risk: frequency of intercourse, number of intercourse partners, and condom use. Predictors included lifetime average measures of contextual, family, and peer process variables and individual behaviors. In addition, similar models for prediction of STD contraction were assessed. A younger age of onset of intercourse was associated with higher numbers of intercourse partners after onset. As hypothesized, findings indicated mediational associations of socioeconomic status, parental monitoring, deviant-peer association, antisocial behavior, and substance use in the prediction of sexual risk behavior. Lower condom use also predicted STD contraction. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Sexual behavior of university students in the Arab Near East.

"In order to obtain data on sex practices and beliefs of male university students in the Arab Near East, and to compare them with data from American universities, a questionnaire was administered to 113 students at the American University of Beirut, Lebanon, under conditions designed to insure anonymity and cooperation." Data on nocturnal emissions, masturbation, homosexual intercourse, and heterosexual intercourse are discussed. An attempt is made to relate the data to known elements of the culture of this area. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Pathways from childhood abuse and neglect to HIV-risk sexual behavior in middle adulthood.

Objective: This study examines the relationship between childhood abuse and neglect and sexual risk behavior in middle adulthood and whether psychosocial factors (risky romantic relationships, affective symptoms, drug and alcohol use, and delinquent and criminal behavior) mediate this relationship. Method: Children with documented cases of physical abuse, sexual abuse, and neglect (ages 0–11) processed during 1967–1971 were matched with nonmaltreated children and followed into middle adulthood (approximate age 41). Mediators were assessed in young adulthood (approximate age 29) through in-person interviews between 1989 and 1995 and official arrest records through 1994 (N = 1,196). Past year HIV-risk sexual behavior was assessed via self-reports during 2003–2004 (N = 800). Logistic regression was used to examine differences in sexual risk behavior between the abuse and neglect and control groups, and latent variable structural equation modeling was used to test mediator models. Results: Child abuse and neglect was associated with increased likelihood of risky sexual behavior in middle adulthood, odds ratio = 2.84, 95% CI [1.74, 4.64], p ≤ .001, and this relationship was mediated by risky romantic relationships in young adulthood. Conclusions: Results of this study draw attention to the potential long-term consequences of child abuse and neglect for physical health, in particular sexual risk, and point to romantic relationships as an important focus of intervention and prevention efforts. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

"Mostly straight" young women: Variations in sexual behavior and identity development.

Researchers have begun to explore and identify various gradations in sexual orientation identity, paying attention to alternative sexual identity categories and attempting to clarify potential subtypes of same-sex sexuality, particularly among women. This study utilizes both quantitative and qualitative data to explore the behavioral experiences and identity development processes among women of a particular sexual identity subtype, "mostly straight." Participants were 349 female college students whose primary sexual identities included exclusively straight, mostly straight, bisexual, and lesbian. Results indicated that, on most behavioral variables, mostly straight women fell directly between and were significantly different from exclusively straight and bisexual/lesbian women. Mostly straight women were also distinct from exclusively straight women but were similar to bisexual women and lesbians on several quantitative measures of identity. Narratives about sexual identity development for mostly straight women revealed the complexities of sexual identity exploration, uncertainty, and commitment within this population. As a whole, this study encourages researchers to begin to recognize and examine mostly straight as a distinct sexual identity subtype in young women. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Is risky sexual behavior continuous or categorical? A taxometric analysis of the Sexual Risk Survey.

Risky sexual behaviors are behaviors that involve the possibility of an adverse outcome, such as contracting a sexually transmitted infection or unwanted pregnancy. The question of whether risky sexual behavior exists as a discrete class (i.e., taxon) or as a dimensional construct has not previously been explored. The authors performed a set of taxometric analyses on 4 factor scales derived from the Sexual Risk Survey (Turchik & Garske, 2009) with data from 1,103 college students. The results provided consistent support for a dimensional latent structure in which variations in reported risky sexual behavior reflect differences in degree and not differences in kind. The implications of these findings for the assessment of risky sexual behavior are discussed. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

Stability and change in religiousness during emerging adulthood.

Understanding the development of religiousness is an important endeavor because religiousness has been shown to be related to positive outcomes. The current study examined mean-level, rank-order, and individual-level change in females' religiousness during emerging adulthood. Genetic and environmental influences on religiousness and its change and stability were also investigated. Analyses were completed with an epidemiological study of 2 cohorts of twins: 1 assessed at ages 14 and 18 and a 2nd at 20 and 25. Mean levels of religiousness decreased significantly with age, while rank-order stability was high. Individual-level change was also evident. Analyses also supported the hypotheses that more change would occur in the younger cohort compared with the older cohort and that more change would occur in religious service attendance than the general index of religiousness. Twin analyses suggested that the heritability of religiousness increased with age, while the shared environmental influences decreased. For the younger cohort, change was genetic in origin, while stability was environmental. In the older cohort, change was influenced by nonshared environment and stability by both genes and family environment. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Delinquent peer affiliation and conduct problems: A twin study.

Many putative environmental risks correlate with individuals' genotypes. The association between delinquent peer affiliation and conduct problems may occur because of shared genetic liability. Five hundred fifty three monozygotic and 558 dizygotic twin pairs, aged 11 to 18 years, were assessed for delinquent peer affiliation and conduct problems. The authors investigated whether genes contribute to both delinquent peer affiliation and the correlation between delinquent peer affiliations and conduct problems. Delinquent peer affiliation was influenced by genetic, shared environmental, and nonshared environmental factors; genetic factors also contributed to the correlation between delinquent peer affiliations and conduct problems, providing evidence for genotype-environment correlation. The magnitude of the genetic variance of conduct problems was contextually dependent on levels of delinquent peer affiliation and was greater at higher levels of delinquent peer affiliation. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Genetic and environmental influences on personality trait stability and growth during the transition to adulthood: A three-wave longitudinal study.

During the transition to adulthood individuals typically settle into adult roles in love and work. This transition also involves significant changes in personality traits that are generally in the direction of greater maturity and increased stability. Competing hypotheses have been offered to account for these personality changes: The intrinsic maturation hypothesis suggests that change trajectories are endogenous, whereas the life-course hypothesis suggests that these changes occur because of transactions with the social environment. This study investigated the patterns and origins of personality trait changes from ages 17 to 29 using 3 waves of Multidimensional Personality Questionnaire data provided by twins. Results suggest that (a) trait changes were more profound in the first relative to the second half of the transition to adulthood; (b) traits tend to become more stable during the second half of this transition, with all the traits yielding retest correlations between .74 and .78; (c) Negative Affectivity declined over time, and Constraint increased over time; minimal change was observed on agentic or communal aspects of Positive Emotionality; and (d) both genetic and nonshared environmental factors accounted for personality changes. Overall, these genetically informed results support a life-course perspective on personality development during the transition to adulthood. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

Trajectories of antisocial behavior and psychosocial maturity from adolescence to young adulthood.

Most theorizing about desistance from antisocial behavior in late adolescence has emphasized the importance of individuals’ transition into adult roles. In contrast, little research has examined how psychological development in late adolescence and early adulthood contributes desistance. The present study examined trajectories of antisocial behavior among serious juvenile offenders from 14 through 22 years of age and tested how impulse control, suppression of aggression, future orientation, consideration of others, personal responsibility, and resistance to peer influence distinguished between youths who persisted in antisocial behavior and youths who desisted. Different patterns of development in psychosocial maturity from adolescence to early adulthood, especially with respect to impulse control and suppression of aggression, distinguished among individuals who followed different trajectories of antisocial behavior. Compared with individuals who desisted from antisocial behavior, youths who persisted in antisocial behavior exhibited deficits in elements of psychosocial maturity, particularly in impulse control, suppression of aggression, and future orientation. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Sexual compulsivity, state affect, and sexual risk behavior in a daily diary study of gay and bisexual men.

Researchers have identified a strong link between sexual compulsivity (SC) and risky sexual behavior among men who have sex with men (MSM). Meanwhile, affect/mood has also been connected with negative sexual health outcomes (sexually transmitted infection/human immunodeficiency virus [HIV] transmission, sexual risk, sex under the influence of drugs/alcohol). Given that SC is characterized by marked distress around one's own sexual behavior, affect may play a central role in SC and HIV risk behavior. Data were taken from the Pillow Talk Project, a pilot study conducted in 2008–2009 with 50 highly sexually active MSM (9 or more male sex partners, ≤ 90 days), of which half displayed SC symptoms and half did not. Forty-seven men completed a daily diary online for 30 days (n = 1,060 diary days), reporting on their sexual behavior and concurrent affect: positive activation, negative activation, anxious arousal, and sexual activation. We conducted HLM analyses using daily affect (Level 1, within subjects) and SC and HIV status (Level 2, between subjects) to predict sexual behavior outcomes. Increased negative activation (characterized by fear, sadness, anger, and disgust) was associated with reduced sexual risk behavior, but less so among sexually compulsive MSM. Sexual activation was associated with increased sexual risk taking, but less so among sexually compulsive MSM. Anxious arousal was associated with increased sexual behavior, but not necessarily sexual risk taking. Findings indicate that affect plays key roles in sexual behavior and sexual risk taking; however, the association between affect and behavior may be different for sexually compulsive and non-sexually compulsive MSM. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Changes in Young People's Sexual Behavior and Attitudes, 1943-1999: A Cross-Temporal Meta-Analysis.

A cross-temporal meta-analysis of 530 studies (N = 269,649) showed that young people's sexual attitudes and behavior changed substantially between 1943 and 1999, with the largest shifts occurring among girls and young women. Both young men and women became more sexually active over time, as measured by age at first intercourse (decreasing from 19 to 15 years among young women) and percentage sexually active (increasing from 13% to 47% among young women). Attitudes toward premarital intercourse became more lenient, with approval increasing from 12% to 73% among young women and from 40% to 79% among young men. Feelings of sexual guilt decreased. The correlation between attitudes and behaviors was stronger among young women. These data support theories positing that culture has a larger effect on women's sexuality. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The structure of language abilities at 4 years: A twin study.

Normal language development was studied in 310 pairs of 4-year-old twins born in the United Kingdom in 1994. Twins were assessed individually in their homes on a diverse battery of language and nonverbal measures. Rotated factor analyses indicated the presence of a general Language factor (L) as well as a general Nonverbal (NV) factor. Moderate genetic influence was found for both L and NV abilities. Bivariate genetic analysis estimated a genetic correlation of .63 between L and NV abilities, implying that over half of the genetic influence on L overlaps with genetic influence on NV. These results suggest that at age 4, genetic influences on individual differences in language overlap substantially with genetic influences on individual differences in other cognitive abilities, although perhaps less so than later in development. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Sexual risk behaviors among substance users: Relationship to impulsivity.

Recent research has suggested that trait impulsivity may predict sexual risk behavior. Few studies have examined this association directly in substance users at risk for HIV transmission. Participants were 330 primarily heroin and/or cocaine users who underwent a structured interview regarding their drug use, sexual behaviors, and impulsivity. Results from an iteratively reweighted least squares regression analysis indicate that impulsivity remained a statistically significant predictor of sexual risk after adjusting for the effects of demographic variables and substance use frequency (b=.179, p     

Child-rearing antecedents of intergenerational relations in young adulthood: A prospective study.

Data gathered from mothers on parenting and family climate when almost 1,000 children in the Dunedin, New Zealand, longitudinal study were 3, 5, 7, 9, 13, and 15 years of age were used to predict intergenerational relations between young adult children (age 26) and their middle-aged parents. Analyses focused on distinct developmental epochs revealed greater prediction from the middle-childhood and early-adolescent periods than from the early-childhood years; most indicated that more supportive family environments and child-rearing experiences in the family of origin forecasted more positive and less negative parent-child relationships (in terms of contact, closeness, conflict, reciprocal assistance) in young adulthood, though associations were modest in magnitude. Some evidence indicated that (modestly) deleterious effects on intergenerational relations of experiencing relatively unsupportive child-rearing environments in 1 but not 2 (of 3) developmental periods studied could be offset by relatively supportive family environments in the remaining developmental periods. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Sexual orientation and suicide attempt: A longitudinal study of the general Norwegian adolescent population.

Past and future suicide attempt rates among gay, lesbian, and bisexual (GLB) young people were compared with those of heterosexual young people. A sample of Norwegian students (N=2,924; grades 7-12) was followed in 3 data collection waves. Risk factors included previous suicide attempt, depressed mood, eating problems, conduct problems, early sexual debut, number of sexual partners, pubertal timing, self-concept, alcohol and drug use, atypical gender roles, loneliness, peer relations, social support. parental attachment, parental monitoring, and suicidal behavior among family and friends. When homosexual attraction, homosexual identity, and same-sex sexual behavior were entered to predict suicide attempt, only same-sex sexual behavior was significantly predictive. The increased odds could not be attributed to GLB students' greater exposure to risk factors for suicide attempt. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Acculturation-Related Variables, Sexual Initiation, and Subsequent Sexual Behavior Among Puerto Rican, Mexican, and Cuban Youth.

The relationship among acculturation-related variables, past sexual activity, and subsequent sexual behavior was examined for a sample of Latino youth in the United States over a 12-month period. A subsample from the National Longitudinal Study of Adolescent Health database was analyzed by means of a prospective design. History of sexual intercourse predicted subsequent sexual behavior over the ensuing 12 months. The acculturation-related variables were related to whether an adolescent reported being sexually active at Wave 1 but in a complex fashion. Among recent immigrants, youth from English-speaking homes were less likely to be sexually active than those from Spanish-speaking homes. The opposite was observed for youth who were born in the United States or who had resided in the United States most of their lives. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Structure of problem behavior in adolescence and young adulthood.

Conducted 3 studies on the structure of behavior, using data collected by the 2nd author and S. L. Jessor (1977). These earlier bivariate findings suggested that diverse problem behaviors, including problem drinking, illicit drug use, delinquent-type behavior, and precocious sexual intercourse, may comprise a single behavioral syndrome in samples of normal adolescents. Data had been collected in 6 self-report waves for 162 male and 222 female Ss from the time they were in Grades 7–9 to when they were aged 25–27 yrs and for 84 males and 100 females from the time they were college students to when they were aged 30 yrs (approximately). In Study 1, a multivariate test of this possible syndrome was carried out through a series of maximum likelihood factor analyses. Analyses were performed by sex on 4 waves of the panel data. In Study 2, multiple random subsamples of adolescents who participated in the 1978 National Study of Adolescent Drinking (J. V. Rachal et al, 1980) were used to determine the generality of the results. In Study 3, the presence of a similar syndrome in Ss in their middle to late 20's was investigated, using data from Study 1. The analyses consistently showed that a common factor accounted for the correlations among the different problem behaviors. The findings support the notion of a syndrome of problem behavior in both adolescence and young adulthood. (45 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Physical activity and sedentary behavior: A population-based study of barriers, enjoyment, and preference.

The associations of physical activity and sedentary behavior with barriers, enjoyment, and preferences were examined in a population-based mail survey of 1,332 adults. Respondents reporting high enjoyment and preference for physical activity were more likely to report high levels of activity. Those reporting cost, the weather, and personal barriers to physical activity were less likely to be physically active. Preference for sedentary behavior was associated with the decreased likelihood of being physically active, and the weather as a barrier to physical activity was associated with the increased likelihood of sedentary behavior. These constructs can be used to examine individual and environmental influences on physical activity and sedentary behavior in specific populations and could inform the development of targeted interventions. (PsycINFO Database Record (c) 2010 APA, all rights reserved)