Causal relations drive young children's induction, naming, and categorization

A number of recent models and experiments have suggested that evidence of early category-based induction is an artifact of perceptual cues provided by experimenters. We tested these accounts against the prediction that different relations (causal versus non-causal) determine the types of perceptual similarity by which children generalize. Young children were asked to label, to infer novel properties, and to project future appearances of a novel animal that varied in two opposite respects: (1) how much it looked like another animal whose name and properties were known, and (2) how much its parents looked like parents of another animal whose name and properties were known. When exemplar origins were known, children generalized to exemplars with similar origins rather than with similar appearances; when origins were unknown, children generalized to exemplars with similar appearances. Results indicate even young children possess the cognitive control to choose the similarities that best predict accurate generalizations.     

P300 amplitude, externalizing psychopathology, and earlier- versus later-onset substance-use disorder

P300 amplitude predicts substance use or disorder by age 21. Earlier- versus later-onset substance disorders may reflect different levels of an externalizing psychopathology dimension. P300 in adolescence may not be as strongly related to later-onset substance problems as it is to earlier-onset ones. In the present study, visual P300 amplitude was measured at age 17 in a community-representative sample of young men. Substance and externalizing disorders were assessed at approximately ages 17, 20, and 24. Earlier-onset (by age 20) substance disorder was associated with higher rates of externalizing disorders than were later-onset problems. P300 amplitude was reduced in subjects with earlier-onset substance disorders, relative to later-onset and disorder-free subjects. Amplitude was also reduced in subjects with an externalizing disorder but no substance disorder. Earlier-onset subjects had reduced P300, even in the absence of an externalizing disorder. The results could not be attributed to a concurrent disorder or to recent substance use at the time of the P300 recording. The findings are consistent with P300 indexing an externalizing spectrum. Earlier-onset substance disorders are more strongly related to P300 and externalizing than are later-onset problems.     

Assessment of the functions of vocal behavior in children with developmental disabilities: a replication

Although experimental analysis methodologies have been useful for identifying the function of a wide variety of target behaviors (e.g., Iwata, Dorsey, Slifer, Bauman, & Richman, 1982/1994), only recently have such procedures been applied to verbal operants (Lerman et al., 2005). In the current study, we conducted a systematic replication of the methodology developed by Lerman et al. Participants were 4 children who had been diagnosed with developmental disabilities and who engaged in limited vocal behavior. The function of vocal behavior was assessed by exposing target vocal responses to experimental analyses. Results showed that experimental analyses were generally useful for identifying the functions of vocal behavior across all participants.     

Gender-specific Normative Misperceptions of Risky Sexual Behavior and Alcohol-related Risky Sexual Behavior

This research examined gender-specific perceptions of risky sexual behavior norms among college students and their relationship with one’s own sexual behavior. We expected that students would misperceive the risky sexual behavior of their peers and that these perceptions would positively relate to their sexual behavior. Undergraduate students from the United States (N?=?687; 57.6% female) completed measures assessing perceived sexual behavior, sexual behavior, and other behaviors (e.g., marijuana use, alcohol consumption). Findings demonstrated that students perceived that others engaged in more risky sexual behavior than they do and that perceived norms were positively associated with one’s own behavior. The incorporation of personalized normative feedback regarding risky sexual behavior into brief interventions aimed at reducing risky sexual behavior is discussed.     

Bullying in college by students and teachers

This study explored bullying in college by students and teachers. The reports of a sample of 1,025 undergraduates indicated that 24.7% had seen students bully other students occasionally and 2.8% very frequently, 5% had been bullied by students occasionally and 1.1% very frequently, 12.8% had seen teachers bully students occasionally and 1.9% very frequently, 4.2% had been bullied by teachers occasionally and .5% very frequently, while 3.2% had bullied other students occasionally and 1.9% very frequently. Male students bullied significantly more than females. Student bullying was predicted by having seen other students bully, and by having been bullied by both students and teachers.     

Addiction motivation reformulated: an affective processing model of negative reinforcement

This article offers a reformulation of the negative reinforcement model of drug addiction and proposes that the escape and avoidance of negative affect is the prepotent motive for addictive drug use. The authors posit that negative affect is the motivational core of the withdrawal syndrome and argue that, through repeated cycles of drug use and withdrawal, addicted organisms learn to detect interoceptive cues of negative affect preconsciously. Thus, the motivational basis of much drug use is opaque and tends not to reflect cognitive control. When either stressors or abstinence causes negative affect to grow and enter consciousness, increasing negative affect biases information processing in ways that promote renewed drug administration. After explicating their model, the authors address previous critiques of negative reinforcement models in light of their reformulation and review predictions generated by their model.     

Getting a cue: the need to belong and enhanced sensitivity to social cues

To successfully establish and maintain social relationships, individuals need to be sensitive to the thoughts and feelings of others. In the current studies, the authors predicted that individuals who are especially concerned with social connectedness--individuals high in the need to belong--would be particularly attentive to and accurate in decoding social cues. In Study 1, individual differences in the need to belong were found to be positively related to accuracy in identifying vocal tone and facial emotion. Study 2 examined attention to vocal tone and accuracy in a more complex social sensitivity task (an empathic accuracy task). Replicating the results of Study 1, need to belong scores predicted both attention to vocal tone and empathic accuracy. Study 3 provided evidence that the enhanced performance shown by those high in the need to belong is specific to social perception skills rather than to cognitive problem solving more generally.     

Taking Care of Business: Self-Help and Sleep Medicine in American Corporate Culture

This article argues that corporate management in the United States has expanded its scope beyond office walls and encompasses many aspects of workers' daily lives. One new element of corporate training is the micromanagement of sleep; self-help books, newspaper reports, magazine articles, and consulting firms currently advise workers and supervisors on optimizing productivity by cultivating certain sleep habits. Although consultants and self-help books make specific recommendations about sleep, most medical research is inconclusive about sleep's benefits for human performance. Using the ideas of Michel Foucault and Gilles Deleuze as a philosophical backdrop, this article examines the complex and often contradictory links between self-help, medicine, and corporate governance.     

The consequences of encoding information on the maintenance of internally generated images and thoughts: the role of meaning complexes

Three experiments investigated the hypothesis that internally generated images and thoughts were driven by meaning complexes, a construct which reflects a synthesis of semantic meaning and personal salience (Klinger, 1999). Experiments 1 and 2 contrasted the mutual inhibition between encoding words and non-words on: (i) the frequency that thoughts and images unrelated to the task (task unrelated thought, TUT) were experienced (Experiment 1) and (ii) on the intensity of images generated from long-term memory and maintained under dual task conditions, which whilst familiar were not of particular personal salience (Experiment 2). Experiment 3 examined the physiological arousal associated with the experience of TUT in a semantic encoding task. Evidence suggested that, in general, internally generated images and thoughts, irrespective of the personal salience, were suppressed by the co-ordination of information in working memory. In addition, only the experience of spontaneous images and thoughts of personal salience (TUT, Experiments 1 and 3) interfered reliably with the encoding/retrieval of semantic information from memory. Finally, in Experiment 3, physiological arousal, as indexed by mean heart rate, was associated with a high frequency of TUT. The results of all three experiments support the notion that the maintenance of spontaneously occurring images and thoughts is simultaneously influenced by both the semantic content and the personal salience of the information held in working memory.     

The dead donor rule: how much does the public care...and how much should we care?

In this brief commentary, we reflect on the recent study by Siminoff, Burant, and Youngner of public attitudes toward "brain death" and organ donation, focusing on the implications of their findings for the rules governing from whom organs can be obtained. Although the data suggest that many seem to view "brain death" as "as good as death" rather than "dead" (calling the dead donor rule into question), we find that the study most clearly demonstrates that understanding an individual's definition of death is neither a straightforward task nor a good predictor of views about donation. Reflecting on the implications for ongoing debates over the dead donor rule, we suggest that perhaps it is not a change in policy that is warranted, but rather a change in the priorities that have garnered such intense focus on this issue within the field of bioethics.