Evaluating the endophenotype model of ADHD neuropsychological deficit: results for parents and siblings of children with ADHD combined and inattentive subtypes

Neurogenetic models predict neuropsychological weaknesses in the relatives of children with attention-deficit/ hyperactivity disorder (ADHD). The authors examined executive and regulatory measures in 386 relatives (307 parents, 79 siblings) of children with ADHD combined type, ADHD inattentive type, and controls. Predicted deficits were seen on trailmaking (relatives of ADHD combined type only), stop-signal reaction times (relatives of girls only), and response variability (mothers only) but not on naming or output speed. Effects generally held, even with relatives' ADHD status controlled. A neuropsychologically impaired subgroup of children with ADHD had relatives with clear neuropsychological weaknesses. The authors conclude that a neurogenetic model of ADHD etiology is supportable only for a subset of executive functions and that neuropsychological heterogeneity warrants more examination in ADHD.     

Cumulative risk disparities in children's neurocognitive functioning: a developmental cascade model

The current longitudinal study examined the role of cumulative social risk on children's theory of mind (ToM) and executive functioning (EF) across early development. Further, we also tested a cascade model of development in which children's social cognition at 18 months was hypothesized to predict ToM and EF at age 4.5 through intermediary language skills at age 3. We then examined whether this developmental mechanism varied as a function of social risk status. Participants were 501 children recruited when they were newborns, at which point eight psychosocial risk factors were assessed and combined into a metric of cumulative social disadvantage. Families were followed up at 18 months, at which point four social‐cognitive skills were assessed using developmentally sensitive tasks: joint attention, empathy, cooperation, and self‐recognition. Language was measured at age 3 using a standardized measure of receptive vocabulary. At age 3 and 4.5, EF and ToM were measured using previously validated tasks. Results showed that there were notable cumulative risk disparities in overall neurocognitive skill development, and these effects became more differentiated over time. Support was also found for a developmental mechanism wherein the effect of social cognition at 18 months on ToM and EF in the preschool period operated specifically through children's receptive language ability at age 3. This pathway functioned similarly for children with both low‐ and high‐risk backgrounds. These results extend previous findings by documenting the role of cumulative social disadvantage on children's neurocognition and the pathways that link key neurocognitive abilities across early development.     

Self‐efficacy as a moderator of negative and positive self‐fulfilling prophecy effects: mothers' beliefs and children's alcohol use

This research examined two issues relevant to self‐fulfilling prophecies. First, it examined whether children's risk for alcohol use, as indicated by their self‐efficacy to refuse alcohol from peers, moderated their susceptibility to negative and positive self‐fulfilling prophecy effects created by their mothers. Second, it explored behavioral mediators that could be involved in the self‐fulfilling process between mothers and children. Longitudinal data from 540 mother–child dyads indicated that (1) low self‐efficacy children were more susceptible to their mothers' positive than negative self‐fulfilling effects, whereas high self‐efficacy children's susceptibility did not vary, (2) mothers' global parenting and children's perception of their friends' alcohol use partially mediated mothers' self‐fulfilling effects, and (3) these mediators contributed to low self‐efficacy children's greater susceptibility to positive self‐fulfilling prophecy effects. The power of self‐fulfilling prophecies, their link to social problems, and the potential for mothers' favorable beliefs to have a protective influence on adolescent alcohol use are discussed. Copyright © 2007 John Wiley & Sons, Ltd.     

Personality Trait Development and Social Investment in Work

A longitudinal study of employed individuals was used to test the relationship between social investment at work—the act of cognitively and emotionally committing to one’s job—and longitudinal and cross-sectional personality trait development. Participants provided ratings of personality traits and social investment at work at two time-points, separated by approximately 3 years. Data were analyzed using latent change models. Cross-sectional results showed that extraversion, agreeableness, conscientiousness, and emotional stability were related to social investment at work. Additionally, a positive association was found between longitudinal change in social investment in work and change in personality traits—especially conscientiousness. Finally, the correlated changes in social investment and personality traits were invariant across age groups, suggesting that personality traits remain malleable across the lifespan.     

Individual differences in distancing responses to women on a photo choice task

A heterogeneous sample of adult women and men responded to a Photo Choice Task (PCT) in which they were asked to make 24 choices between two persons for a hypothetical interaction; eight of the choices were between a woman and a man. Participants also responded to a measure of adherence to Sex Role Stereotypes and to a measure of Adversarial Sexual Beliefs. On the eight choices between a woman and a man on the PCT, men over 30 and younger than 30 chose women below chance level. Women over 30 made other-gender and same-gender choices that did not differ from chance, but the women under 30 chose women over men reliably more than chance. Small but significant positive correlations were found among the scores on the PCT and the belief measures; for the total sample, the greater the choice of men over women for hypothetical interactions, the greater the agreement with sex role stereotypes and with adversarial sexual beliefs. An examination of mean differences in belief scores among groups of persons whose PCT scores (choice of men over women) were low, medium, and high revealed that men who were more likely to turn away from women in hypothetical situations were also more likely to adhere to stereotyped beliefs about sex roles and to view relationships between women and men as adversarial. This same pattern of individual differences was found among women but, for women, only the relationship between PCT scores and sex role stereotyping was significant.     

The sexual harassment of uppity women

In 3 studies, the author tested 2 competing views of sexual harassment: (a) It is motivated primarily by sexual desire and, therefore, is directed at women who meet feminine ideals, and (b) it is motivated primarily by a desire to punish gender-role deviants and, therefore, is directed at women who violate feminine ideals. Study 1 included male and female college students (N = 175) and showed that women with relatively masculine personalities (e.g., assertive, dominant, and independent) experienced the most sexual harassment. Study 2 (N = 134) showed that this effect was not because women with relatively masculine personalities were more likely than others to negatively evaluate potentially harassing scenarios. Study 3 included male and female employees at 5 organizations (N = 238) and showed that women in male-dominated organizations were harassed more than women in female-dominated organizations, and that women in male-dominated organizations who had relatively masculine personalities were sexually harassed the most.     

Predicting eating disorder group membership: an examination and extension of the sociocultural model

The purpose of this research was to examine and extend portions of the sociocultural model of bulimia nervosa (Stice, E. (1994). Review of the evidence for a sociocultural model of bulimia nervosa and an exploration of the mechanisms of action. Clinical Psychology Review, 14, 633-661; Stice, E., & Agras, W. S. (1998). Predicting onset and cessation of bulimic behaviors during adolescence: A longitudinal grouping analysis. Behavior Therapy, 29, 257-276). Participants were women who reported engaging in binge eating at baseline and the 1-year follow-up (n = 26), women who began binge eating between these 2 points (n = 25), and women who did not report binge eating during the course of the study (n = 199). Results of the first discriminant function analysis provided support for the sociocultural model. However, the results of subsequent analyses suggest that additional variables, including stress, escape-avoidance coping, and interoceptive awareness, emerged as important. Implications of these findings for our understanding of the development and maintenance of binge eating are discussed.     

Decomposition can harm the accuracy of behavioural frequency reports

In survey research, the use of decomposition can lead to pronounced reporting errors as seen by overreporting and overall reporting error. A total of 87 subjects answered either decomposed or undecomposed questions concerning telephone calls made by them while at work. The questionnaire conditions varied the length of the reference period (1 week or 6 months), and the type of call (local or long‐distance). Decomposition conditions introduced either spatial or temporal cues. In all comparisons, decomposed questions increased overreporting bias relative to undecomposed questions. In addition, undecomposed questions with a 1‐week reference period led to increased overreporting bias in comparison to undecomposed/6‐month questions. Results are consistent with a category split estimation model in which smaller categories are predicted to lead to overreporting, and larger categories to underreporting. Decomposition is not recommended for gaining retrospective reports of non‐distinctive, frequent events. Copyright © 2000 John Wiley & Sons, Ltd.