Differential prefrontal–temporal neural correlates of semantic processing in children

This study used functional magnetic resonance imaging (fMRI) to examine brain–behavior correlations in a group of 16 children (9- to 12-year-olds). Activation was measured during a semantic judgment task presented in either the visual or auditory modality that required the individual to determine whether a final word was related in meaning to one of two previous words (e.g., found–tank–lost). The main finding was that higher performers (i.e., accuracy) were associated with more activation in posterior representational systems including the inferior and middle temporal gyri, whereas lower performers were associated with more activation in anterior regions including the inferior and middle frontal gyri. This pattern of results was interpreted as reflecting an elaborated semantic representational system in temporal areas for the high accuracy performers that allowed them to efficiently and accurately make meaning based judgments. The low accuracy performers may have an inaccurate or weakly interconnected semantic system that results in greater use of frontal areas in a feature selection process.     

Temporal dynamics of information use in learning and retention of predator-related information in tadpoles

Due to the high variability in predation risk through space and time, prey have to continuously update information about the risk level posed by predators. Despite numerous studies focusing on temporal risk assessment, we know very little about how individuals deal with information regarding changes in risk level of a given predator through time. In this study, we conditioned tadpoles to recognize a predator as a high or low risk twice 2 weeks apart, in a 2 × 2 design. We tested the responses of the tadpoles 1 and 11 days after each conditioning event. Prey showed responses to the predator 1 day after the first conditioning, but the low-risk group failed to respond to the predator after 11 days. However, we found that information learned during the first conditioning affected the response to the predator after the second conditioning, indicating that prey do not ‘forget’ old information, but simply ignore it. Moreover, tadpoles were able to assess their change in vulnerability over the 2-week period and further extrapolate the risk level of the predator through time to display adaptive threat-sensitive antipredator responses. Our study highlights the complex decision-making that prey use to assess temporal fluctuation in predation risk.     

Strict and random alternation in concurrent variable-interval schedules

Six pigeons responded on pairs of concurrent variable-interval schedules with, in different parts, four different arrangements of alternation between schedules. Following a single switching-key response, alternation was either strict or random, and the alternative presented after a switch (the postswitch alternative) was either signaled by the location of the switching key or unsignaled. Generalized-matching analyses showed little difference in behavior among the different alternation arrangements, except the usual finding of lower sensitivity of response allocation than time allocation was eliminated by arranging random alternation. Patterns of interchangeover times were similar for all arrangements except signaled random alternation. Differences in behavior preceding the different postswitch alternatives were found in the signaled random alternation procedure. Preference was biased towards the color of the signaled postswitch alternative and showed increased sensitivity when the postswitch alternative was to be the one with the higher reinforcer rate. Interchangeover times were substantially shorter when the postswitch alternative was signaled to be different from the current alternative than when it was signaled to be the same. However, when separate reinforcer ratios were calculated for the different postswitch alternatives, those effects were eliminated or greatly reduced. We suggest that, although behavior is indeed influenced by the postswitch alternative, the mechanism is indirect. That is, the distributions of reinforcers between alternatives obtained before each postswitch alternative differ when those alternatives are signaled, and those distributions are discriminated, but the same relations between choice and relative reinforcement hold irrespective of which postswitch alternative is signaled.     

Depression and HIV infection: impact on immune function and disease progression

Can psychological factors, such as depression, affect human immunodeficiency virus progression? HIV infection is viewed as a chronic illness in which those infected often confront a number of emotional challenges and physical health and disease-related issues. Over the past 20 years, there has been increasing evidence that depression and other mood-related disturbances are commonly observed among HIV-positive individuals. There is also mounting data showing that depressive symptoms might further impact upon specific elements of immune system functioning and influence quality of life and health status. This paper will highlight studies examining the prevalence of depression during HIV infection and review some of the evidence examining the impact of depressive symptoms on immune function and HIV disease progression.     

How societal stereotypes might form and evolve via cumulative cultural evolution

The current article examines how societal stereotypes might form and evolve through a process of cumulative cultural evolution as social information is repeatedly passed from person to person. Social psychology research has done much to inform our understanding about the substantial influence stereotypes exert on us as individuals and on our society, yet comparatively little is known about how society's pools of stereotype knowledge form and how they evolve. Here, we review evidence that as social information is repeatedly passed from person to person, there is a continuous cycle of stereotype formation and evolution that is driven by constraints and biases in (a) observations of the social environment, (b) cognitive representations of the social environment, and (c) social transmissions of cognitive representations of the social environment. We suggest the reason stereotypes exist and persist is because they are perfectly adapted for human cognition and the reason they are perfectly adapted for human cognition is because they are the cumulative product of human cognition.     

Reply to Kenneth Thomas's “Wild Analysis in Politics”

We try to clarify Kenneth Thomas's (“Wild Analysis in Politics”) mistakes about our analysis of the question: Do right‐wing authoritarian (RWA) beliefs originate from psychological conflict? We suggest, contrary to Thomas's analysis, an approach that builds on the kinds of psychodynamic causes we use to explain RWA and the importance of confirming them empirically.     

Cultural Adaptation of a Cognitive Behavior Therapy Guided Self‐Help Program for Mexican American Women With Binge Eating Disorders

Data on the compatibility of evidence‐based treatment in ethnic minority groups are limited. This study utilized focus group interviews to elicit Mexican American women's (N= 12) feedback on a cognitive behavior therapy guided self‐help program for binge eating disorders. Findings revealed 6 themes to be considered during the cultural adaptation process and highlighted the importance of balancing the fidelity and cultural relevance of evidence‐based treatment when disseminating it across diverse racial/ethnic groups.     

Juveniles tried as adults: the age of the juvenile matters

Serious juvenile crimes require evaluation of a child as a criminal defendant in adult court. In such cases, it is crucial to understand jurors' attitudes, biases, and ability to follow legal instructions and maintain fairness. 308 undergraduate psychology students served as mock jurors, were randomly separated into four groups, and each group read the same realistic summary of a trial with the defendant's age presented as 13, 15, 17, or 21 years. Participants were asked to render guilty or not guilty verdicts and, if guilty, to suggest sentences. Chi-squared analysis indicated 13- and 15-year-old defendants were convicted less often than 17- and 21-year-old defendants, showing that jurors distinguished between juvenile defendants of different ages, but not minors and adults as defined by law. Additional analysis showed that age did not affect sentencing recommendations. Decision processes jurors use for juveniles tried as adults are discussed.     

Homelessness and response styles on the Personality Assessment Inventory in a compensation-seeking sample

The relationship between validity measures of the Personality Assessment Inventory (PAI; Morey, 1991) and homelessness was investigated in this archival study. Two groups (N = 50) of compensation-seeking adults were included: homeless and domiciled. The purpose of the study was to determine if differences existed between these 2 groups on the validity measures of the PAI to inform the clinical evaluations of the compensation-seeking homeless. Results of independent sample t tests indicated no significant differences between the homeless and domiciled groups on the 4 validity scales and 2 additional indexes of exaggerated responding (Malingering Index [Morey, 1996] and Rogers Discriminant Function [Rogers, Sewell, Morey, & Ustad, 1996]). Results suggested the compensation-seeking homeless have similar elevations on the PAI validity indexes as domiciled groups seeking compensation.