Recovering faces from memory: the distracting influence of external facial features

Recognition memory for unfamiliar faces is facilitated when contextual cues (e.g., head pose, background environment, hair and clothing) are consistent between study and test. By contrast, inconsistencies in external features, especially hair, promote errors in unfamiliar face-matching tasks. For the construction of facial composites, as carried out by witnesses and victims of crime, the role of external features (hair, ears, and neck) is less clear, although research does suggest their involvement. Here, over three experiments, we investigate the impact of external features for recovering facial memories using a modern, recognition-based composite system, EvoFIT. Participant-constructors inspected an unfamiliar target face and, one day later, repeatedly selected items from arrays of whole faces, with "breeding," to "evolve" a composite with EvoFIT; further participants (evaluators) named the resulting composites. In Experiment 1, the important internal-features (eyes, brows, nose, and mouth) were constructed more identifiably when the visual presence of external features was decreased by Gaussian blur during construction: higher blur yielded more identifiable internal-features. In Experiment 2, increasing the visible extent of external features (to match the target's) in the presented face-arrays also improved internal-features quality, although less so than when external features were masked throughout construction. Experiment 3 demonstrated that masking external-features promoted substantially more identifiable images than using the previous method of blurring external-features. Overall, the research indicates that external features are a distractive rather than a beneficial cue for face construction; the results also provide a much better method to construct composites, one that should dramatically increase identification of offenders.     

Enumeration of small and large numerosities: the effect of element visibility

Precise enumeration is associated with small numerosities within the subitizing range (<4 items), while approximate enumeration is associated with large numerosities (>4 items). To date, there is still debate on whether a single continuous process or dual mutually exclusive processes mediate enumeration of small and large numerosities. Here, we evaluated a compromise between these two notions: that the precise representation of number is limited to small numerosities, but that the approximate representation of numerosity spans across both small and large numerosities. We assessed the independence of precise and approximate enumeration by looking at how luminance contrast affected enumeration of elements that differ by ones (1-8) or by tens (10-80). We found that enumeration functions of ones and tens have different characteristics, which is consistent with the presence of two number systems. Subitizing was preserved for small numerosities. However, simply decreasing element visibility changed the variability signatures of small numerosities to match those of large numerosities. Together, our results suggest that small numerosities are mediated by both precise and approximate representations of numerosity.     

Motor impairment and antisocial behavior in adolescent males at high risk for schizophrenia

A familial link between schizophrenia and antisocial behavior has been established (e.g., Silverton, 1985). This study examined this relationship in a Danish cohort. The subjects were 36 high-risk males (offspring of a schizzophrenic parent) and 36 low-risk males (offspring of parents without psychopathology). This high-risk subjects exhibited more antisocial behavior than the low-risk subjects. We tested the hypothesis of a correlation between neurointegrative deficits, as defined by motor impairment, and antisocial behavior, rated at ages 10–13, in subjects at genetic risk for schizophrenia. Path analyses were conducted from motor impairment at 1 year and motor impairment at 10–13 years to antisocial behavior separately for high-risk and low-risk subjects. Adolescent motor impairment was a significant predictor of antisocial behavior for high-risk subjects. Motor impairment at 1 year was also associated with antisocial behavior for these subjects, although the association was partly due to the indirect effects of motor impairment at 1 year on motor impairment at 10–13 years, which, in turn, was associated with changes in antisocial behavior. As predicted, none of the path coefficients nor the effect coefficient was significant for low-risk subjects.     

A mobile research laboratory

A .75-ton van was modified to make a mobile research laboratory suitable for visual psychophysical testing under well controlled conditions. The laboratory can be adapted easily to other types of psychological research in which environmental control and/or special-purpose equipment is required.     

Psychological androgyny and college students' judgments of mental health

College students' perceptions of the mental health of men and women were examined in comparison to an adult health standard. Two hundred forty male and female undergraduates were asked to describe a socially competent healthy adult man, healthy adult woman, or a healthy adult (sex unspecified) using the Bem Sex-Role Inventory, which provides a measurement of androgyny as well as masculinity and femininity. In accordance with the Broverman, Broverman, Clarkson, Rosenkrantz, and Vogel (1970) study of clinicians' perceptions, the healthy man was described as similar to the adult standard, while the healthy woman was not. Unlike the Broverman et al. (1970) study, the male but not the female subjects perceived the healthy woman as different, suggesting that college women may be less likely to endorse sex-linked conceptions of mental health than their male counterparts.     

Bullying behaviors in female and male adolescent offenders: prevalence,types, and association with psychosocial adjustment

Despite the surge of research on bullying, few studies have examined bullying in young offenders, particularly female young offenders. This study investigated the prevalence, types, and correlates of bullying behaviors in 193 male and 50 female incarcerated adolescents from nine young offender facilities. Overall, 37% of participants identified themselves as bully‐victims, 32% as pure bullies, 23% as not involved, and 8% as pure victims. In comparison to males, females were more likely to report being involved with bullying in some capacity, particularly as pure victims, and being bullied by sexual touching and comments. Pure victims reported higher rates of psychological distress and suicidal behaviors than those youth not involved in bullying, and pure bullies were more likely to have been previously incarcerated and affiliated with a gang. Bully‐victims reported the highest rates of previous abuse, peer victimization in the community, drug use, and suicide attempts while in custody. All groups, including pure victims, reported high rates of bullying others in the community. Treatment providers should recognize that offenders who are victims are often bullies as well, and be alert to broad mental health needs among victims and bully‐victims. Given the prevalence and potential serious consequences of bullying, the development of anti‐bullying policies appears to be an important step in recognizing and reducing bullying. Aggr. Behav. 00:1–16, 2005. © 2005 Wiley‐Liss, Inc.     

Organizational Membership versus Informal Interaction: Contributions to Skills and Perceptions that Build Social Capital

Participation in formal organizations has been considered a marker of social capital, but informal interactions may also provide social-capital relevant benefits. The current studies (N = 252 undergraduates; 60 adult members of a service organization) assessed skills, outcomes, and social-structural perceptions that may be developed from organizational or informal participation. Results suggested that organizations serve as potential training grounds for diverse types of civic participation; individuals hone their leadership and public speaking skills within the structures provided by organized groups. On the other hand, informal interaction also contributed importantly to social capital formation by fostering negotiating skill, the sharing of opinions, and companionship, and by creating networks of mutual obligation.