Invalid cues impair auditory motion sensitivity

Compelling lateral motion can be experienced when intensity differences between the two cars change over time. Whether our sensitivity to this dynamic interaural stimulation could be influenced by directional cues was the focus of the present study. On each trial, amplitude-modulated pure tones were presented either diotically (no-motion condition) or dichotically (motion condition), and participants indicated whether lateral motion was present or absent. Randomly across trials, the stimuli were preceded by a valid directional cue, an invalid directional cue, or no cue, while the motion to be detected was identical across these cue conditions. The data indicate that motion sensitivity was comparable in the valid-cue and no-cue conditions. Relative to each of those conditions, however, motion sensitivity was significantly lower in the invalid-cue condition, and motion was reported significantly less often. The results provide evidence that our sensitivity to dynamic interaural intensity differences can be significantly affected by a non-sensory factor, namely cue validity.     

Fitness effects on the cognitive function of older adults: a meta-analytic study

A meta-analytic study was conducted to examine the hypothesis that aerobic fitness training enhances the cognitive vitality of healthy but sedentary older adults. Eighteen intervention studies published between 1966 and 2001 were entered into the analysis. Several theoretically and practically important results were obtained. Most important, fitness training was found to have robust but selective benefits for cognition, with the largest fitness-induced benefits occurring for executive-control processes. The magnitude of fitness effects on cognition was also moderated by a number of programmatic and methodological factors, including the length of the fitness-training intervention, the type of the intervention, the duration of training sessions, and the gender of the study participants. The results are discussed in terms of recent neuroscientific and psychological data that indicate cognitive and neural plasticity is maintained throughout the life span.     

The state of psychological assessment in Asia

The collection of articles in this special section provides a much-needed examination of the state of psychological assessment in various Asian countries or societies. In particular, the contributors review and critique assessment of personality, depression and anxiety, children and adolescents, and neuropsychological evaluation. The reviews cover the use of, and research on, imported measures (Western derived) as well as indigenous measures that were developed locally. The articles make a valuable contribution toward understanding not only the state of assessment in Asia but also larger issues such as the universal applicability of assessment instruments and the cross-cultural validity of models of human behavior.     

Interpersonal precipitants and suicide attempts in borderline personality disorder

Borderline personality disorder (BPD) is often characterized by multiple low lethality suicide attempts triggered by seemingly minor incidents, and less commonly by high lethality attempts that are attributed to impulsiveness or comorbid major depression. The relationships among life events, impulsiveness, and type of suicidal behavior has hardly been studied in BPD and mood disorders. This study compared depressed attempters with and without BPD to identify specific suicide precipitants and risk factors in BPD and their relationship to severity of suicidal behavior. Attempters with comorbid BPD and major depressive disorder (MDD) had a higher number of lifetime suicide attempts; made their first attempt at a younger age; reported more interpersonal triggers; and had higher levels of lifetime aggression, hostility, and impulsivity, compared with attempters with major depression only. Environmental triggers of attempts in BPD are more likely to be interpersonal stressors. Lethality of attempts in BPD plus MDD is equal to that in MDD only, indicating that the seriousness of precipitants is unrelated to the lethality of the suicidal behavior. The differences between groups suggest that risk assessment and treatment should target both depression and personality disorder in those with combined illness.     

Measurement Equivalence and Multisource Ratings for Non-managerial Positions: Recommendations for Research and Practice

ABSTRACT: The present investigation applies a comprehensive sequence of confirmatory factor analysis tests (Vandenberg and Lance, Organisational Research Methods, 3, 4–69, 2000) to the examination of the measurement equivalence of self, peer, and supervisor ratings of non-managerial targets across several performance dimensions. Results indicate a high degree of measurement equivalence across rater sources and performance dimensions. The paper illustrates how this procedure can identify very specific areas of non-equivalence and how the complexity of a multisource feedback system may be represented using such procedures. Implications of these results and recommendations for both research and practice are offered.     

Higher-order dimensions of personality disorder: hierarchical structure and relationships with the five-factor model, the interpersonal circle, and psychopathy

Two studies examined the higher-order factor structure of DSM-IV personality disorders using the International Personality Disorder Examination in male forensic psychiatric patients. In Study 1 (N = 168), exploratory factor analysis at the level of individual personality disorder criteria indicated nine primary factors. Exploratory and confirmatory factor analyses of these first-order factors supported a hierarchical structure in which two of three second-order factors covaried to yield a third-order factor. The two resulting superordinate factors were labelled Anxious-Inhibited and Acting Out. In Study 2 (N = 160), we used exploratory and confirmatory factor analyses to test hypotheses of common dimensions underlying these superordinate factors of personality disorder and superordinate factors of the five-factor model of personality, dimensions of the interpersonal circle, and psychopathy. Of three common factors, one combined Anxious-Inhibited disorders, "neurotic introversion," and hostile-submission. The other two factors of Acting Out/ psychopathy and antagonism/hostile-dominance covaried to yield a superordinate factor. Possible substrates underlying two superordinate dimensions common to normal and abnormal personality were identified in the theoretical literature.     

Conditioned inhibition of cocaine seeking in rats

Despite its potential relevance to the treatment of drug abuse, conditioned inhibition of drug seeking has not been systematically investigated before. In this study, rats could self-administer cocaine by lever pressing whenever a click or tone was present. Responding was not reinforced when a light was present. The light was presented simultaneously with the click (i.e., in an excitatory context) in 1 group, but the light was always presented alone in another group. When it was later presented in compound with the tone, the light was a highly effective conditioned inhibitor, suppressing cocaine seeking by 92% in the former group and by 74% in the latter. These results suggest ways to improve cue-oriented behavioral treatments for drug abuse.     

Vocal behavior in the dyadic interactions of preadolescent and early adolescent friends and acquaintances

Conversational interactions of sixth-grade friends and acquaintances in mixed- and same-gender pairs were computer analyzed so that the individual and dyadic time patterns of their vocal behavior could be examined. A comparison of their time patterns revealed that the boy-boy pairs used more and longer segments of simultaneous speech with acquaintances than with friends whereas the girl-girl pairs did the opposite. In general, partners tended to coordinate the durations of their vocal behaviors with each other but, more specifically, the boys coordinated the timing of their speaking turns and switching pauses more when they were friends than when they were acquaintances, and the girls again did the opposite. Finally, the girls coordinated the durations of their pauses significantly more than did the boys regardless of whether they were with friends or acquaintances or in mixed- or same-gender pairs.