Asymmetrical stimulus generalization following differential fear conditioning

Rodent ultrasonic vocalizations (USVs) are ethologically critical social signals. Rats emit 22 kHz USVs and 50 kHz USVs, respectively, in conjunction with negative and positive affective states. Little is known about what controls emotional reactivity to these social signals. Using male Sprague–Dawley rats, we examined unconditional and conditional freezing behavior in response to the following auditory stimuli: three 22 kHz USVs, a discontinuous tone whose frequency and on–off pattern matched one of the USVs, a continuous tone with the same or lower frequencies, a 4 kHz discontinuous tone with an on–off pattern matched to one of the USVs, and a 50 kHz USV. There were no differences among these stimuli in terms of the unconditional elicitation of freezing behavior. Thus, the stimuli were equally neutral before conditioning. During differential fear conditioning, one of these stimuli (the CS⁺) always co-terminated with a footshock unconditional stimulus (US) and another stimulus (the CS⁻) was explicitly unpaired with the US. There were no significant differences among these cues in CS⁺-elicited freezing behavior. Thus, the stimuli were equally salient or effective as cues in supporting fear conditioning. When the CS⁺ was a 22 kHz USV or a similar stimulus, rats discriminated based on the principal frequency and/or the temporal pattern of the stimulus. However, when these same stimuli served as the CS⁻, discrimination failed due to generalization from the CS⁺. Thus, the stimuli differed markedly in the specificity of conditioning. This strikingly asymmetrical stimulus generalization is a novel bias in discrimination.     

Assessing personality at risk in personnel selection and development

This paper demonstrates the validity and usefulness of a count technique to screen for potential personality dysfunctioning in NEO‐PI‐R ratings obtained in selection and professional development assessments. The usefulness of this screening technique for Industrial, Work and Organizational (IWO) psychologists is demonstrated in five different samples that were administered the NEO‐PI‐R for selection or development purposes. Three additional samples served as normative data to compute FFM PD count cut‐offs that can be used for selection and career development decisions. Evidence for the construct validity of 6 out of 10 FFM PD counts was provided, and all FFM PD compound scales were significantly related to important criteria, including the final selection decision, the results of a behaviourally oriented selection interview and self‐rated work competencies. The practical utility and limitations of this count technique for personnel selection and development are discussed. Copyright © 2008 John Wiley & Sons, Ltd.     

The RNA World and Divine Action in and Through Quantum Mechanics

ABSTRACT

Life emerged on Earth approximately 4.1 billion years ago. Current scholarship on the origin of life supports the RNA world scenario, although controversy still goes on. This article examines the origin issue in light of a divine action theory proposed by Robert J. Russell. Although the author himself has not much considered the issue in light of the divine action, the article is still fruitful in the sense that the origin of life issue is now incorporated into the dialogue with divine action, and also that Russell’s divine action theory can be reconsidered in a new context.     

The utility of the Psychopathy Checklist-Revised (PCL-R) facet and item scores in predicting violent recidivism

There is relatively limited research on psychopathy in non-Caucasian ethnic groups and even less on the utility of the Psychopathy Checklist-Revised (PCL-R) that focuses on PCL-R facet and item scores in predicting violent recidivism. In this study, we assessed the utility of the PCL-R in prospectively predicting violent versus nonviolent recidivism during an 11-year follow-up window. A high-risk sample of 451 incarcerated Korean male offenders was assessed on the PCL-R at baseline. A total of 445 were reconvicted after release (353 violent and 92 nonviolent recidivists). Psychopathy facet scores were higher in violent compared to nonviolent recidivists. Facet 2 (affective) showed the strongest effect size (Cohen's d = 0.53; Percentage change in odds = 22.6%) in predicting violent recidivism. Analyses of the four items constituting the affective facet indicated that callous/lack of empathy (Percentage change in odds = 134.4%) and failure to accept responsibility (Percentage change in odds = 94.5%) were the strongest predictors of violent recidivism. Findings are to our knowledge the first to document the utility of the PCL-R in distinguishing violent from nonviolent recidivism and highlight the role of affective impairment (particularly lack of empathy) in violent recidivism.     

Multidimensional Assessment of Body Dissatisfaction and Disordered Eating in Korean and US College Women: A Comparative Study

Body dissatisfaction was studied in 139 Korean and 102 US college women. Because tumultuous social change has produced marked conflicts between traditional Confucian values and a modern industrial society in which women hold increasing social, political, and economic power, it was hypothesized that Korean college women would have greater body dissatisfaction and more behaviors associated with disordered eating than US college women. As hypothesized, when body size (BMI) was controlled the Korean sample exhibited greater body dissatisfaction than the US sample as measured by the discrepancy between actual and ideal BMI, discrepancies between the participants’ bodies and three ideal bodies on the Figural Rating Scale (Stunkard, Sorenson, & Schulsinger, The genetics of neurological and psychiatric disorders, Raven Press, New York, pp. 115–120, 1983), all three measures from the Body Esteem Scale (Franzoi & Shields, Journal of Personality Assessment, 48:173–178, 1984), and all three measures from the Body-Esteem Scale for Adolescents and Adults (Mendelson, Mendelson, & White, Concordia University Research Bulletin, 16:1–12, 1997). Although the Korean sample had more behaviors characteristic of disordered eating on the Eating Disorders Inventory (Garner, Olmstead, & Polivy, International Journal of Eating Disorders, 2:15–31, 1983) Bulimia Scale, no differences were found between samples on scores on the Drive for Thinness Scale.     

The automaticity of visual statistical learning

The visual environment contains massive amounts of information involving the relations between objects in space and time, and recent studies of visual statistical learning (VSL) have suggested that this information can be automatically extracted by the visual system. The experiments reported in this article explore the automaticity of VSL in several ways, using both explicit familiarity and implicit response-time measures. The results demonstrate that (a) the input to VSL is gated by selective attention, (b) VSL is nevertheless an implicit process because it operates during a cover task and without awareness of the underlying statistical patterns, and (c) VSL constructs abstracted representations that are then invariant to changes in extraneous surface features. These results fuel the conclusion that VSL both is and is not automatic: It requires attention to select the relevant population of stimuli, but the resulting learning then occurs without intent or awareness.     

Attention deficit hyperactivty disorder in Korean juvenile delinquents

This study was conducted to identify attention deficit hyperactivity disorder (ADHD) in Korean juvenile delinquents. Intelligence tests (KEDI-WISC, K-WAIS), the Test of Variables of Attention (TOVA), the Teacher Report Form (TRF), the Youth Self-Report (YSR), and the Rosenberg Self-Esteem Scale were administered to 98 incarcerated Korean adolescents (the delinquent group) and 84 adolescent nondelinquents (the control group). The groups were compared, and significant differences were found for ADHD; 42.4% of the adolescents in the delinquent group were identified as having ADHD, in comparison to 11.9% of the adolescents in the control group. Delinquent adolescents and adolescents with ADHD were found to have lower IQ scores, poorer TOVA performance, more severe problem behaviors, and lower self-esteem than nondelinquent adolescents and adolescents without ADHD. Delinquent adolescents with ADHD consistently fared the worst on assessments of intelligence, TOVA performance, problem behaviors, and self-esteem.     

Eudaimonism and the Ground of Normative Reasons

This essay develops an argument against eudaimonism in support of John Hare's earlier critique of eudaimonism. In contrast to Hare, who mounts a Kantian-Scotist objection to what he calls a single-source view of motivation in eudaimonism, my critique of eudaimonism focuses on the ground of normative reasons in eudaimonism while also taking a page from Scotus's ethics. I argue that the main issue with eudaimonism is with the ultimate end and manner of our willing, which fails to correspond to the right ordering of love based on the nature of goodness in the object.