Adolescents who apparently are invulnerable to drug, alcohol, and nicotine use

As part of a large survey of addictive behavior in high school students, a group of 43 girls and 34 boys was identified who denied any use of drugs, alcohol, or tobacco. These apparently invulnerable adolescents were compared to the rest of the "user" sample on the remaining items of the questionnaire. The invulnerable students reported generally better physical and mental health and academic achievement. They also indicated a significantly lower rate of similar problems in their parents.     

Reexamination of spectral mechanisms in the rat (Rattus norvegicus)

The spectral mechanisms of the rat were studied in electrophysiological and behavioral experiments. The photopic electroretinogram (ERG) was recorded (a) to rapidly flickering lights, (b) during the cone phase of dark adaptation, and (c) with a flicker photometric procedure. Each procedure indicated the presence of a single cone mechanism having a lambda max of about 510 nm. Increment-threshold spectral sensitivity functions measured in a behavioral test situation yielded the same conclusion. A behavioral experiment failed to produce any evidence for the presence of color vision in this rodent. The consistent conclusion from both behavioral and electrophysiological experiments is that the rat retina contains only a single photopic spectral mechanism.     

Conditioned suppression of drl responding: Effect of ucs intensity, schedule parameter, and schedule context

In Experiment I, groups of rats were trained to press a lever for food reinforcement on differential reinforcement of low rate (DRL) schedules which differed in parameter value. A stimulus which terminated with either a 0.5-mA or 2.0-mA electric shock was then superimposed upon each DRL baseline. In general, the magnitude of conditioned suppression was an inverse function of DRL schedule parameter and a direct function of shock intensity. Experiment II demonstrated that the rate of responding maintained by the DRL component of a multiple DRL-extinction schedule decreased during a stimulus preceding a 0.5-mA shock, whereas the rate of responding maintained by the DRL component of a multiple DRL-variable interval schedule showed little change or increased slightly during a stimulus preceding a 0.5-mA shock.     

Psychosocial and Biomedical Predictors of Attention and Memory in End-Stage Renal Disease Patients

This study examined the neurocognitive functioning of 554 end-stage renal disease (ESRD) patients to determine the underlying factor structure of tests of attention and memory and to assess the differential impact of psychosocial and biomedical variables on these factors. Analysis revealed three underlying factors: Sustained Attention, Focused Attention, and Memory Recall. Hierarchical regression analyses revealed that psychosocial and biomedical variables were most strongly related to the Focused Attention factor. Education, vocabulary score, age, race, age by creatinine, creatinine, and renal replacement therapy accounted for 30% of variance in Focused Attention; sex, depression, and hypertension were unrelated. After controlling for demographic and medical variables, type of renal replacement therapy was a statistically, but not clinically, significant predictor of Focused Attention, with peritoneal dialysis associated with better attentional performance relative to hemodialysis. The potential relationship between focused attention and compliance is discussed.     

Does Age Make a Difference? Age as Moderator in the Association Between Time Perspective and Happiness

A balanced time perspective can help retaining or improving happiness. Research shows shifts in time perspective while ageing. In order to reach a better understanding of the value of time perspective in different age groups, results are reported of a survey (n = 525), which examines the moderating role of age in the association between time perspective and happiness. Time perspective was measured by the Zimbardo Time Perspective Inventory (ZTPI) (Zimbardo and Boyd in J Personal Soc Psychol 77:1271–1288, 1999) and to measure happiness, the Subjective Happiness Scale of Lyubomirsky and Lepper (Soc Indic Res 46:137–155, 1999) was used. Regression analysis shows that time perspective is indeed associated with happiness and that, although the assumed shifts in time perspective over time were not found, age does act as a moderator of this association. With ageing, the negative association between a past-negative time perspective and happiness weakens. These results add to our understanding of the theoretical concept of time perspective and shed new light on the value of a balanced time perspective for someone’s wellbeing. Theoretical and practical implications of these findings are discussed.     

Cognitive behavior therapy for fear of flying: sustainability of treatment gains after September 11

This study examines the long-term efficacy of cognitive-behavioral therapy (CBT) for fear of flying (FOF) after a catastrophic fear-relevant event, the September 11, 2001, terrorist attacks. Participants (N = 115) were randomly assigned to and completed treatment for FOF using 8 sessions of either virtual reality exposure therapy (VRE) or standard exposure therapy (SE) prior to September 11, 2001. Individuals were reassessed in June, 2002, an average of 2.3 years after treatment, with a response rate of 48% (n = 55). Analyses were run on the original data and, using multiple imputation procedures, on imputed data for the full sample. Individuals maintained or improved upon gains made in treatment as measured by standardized FOF questionnaires and by number of flights taken. There were no differences between VRE and SE. Thus, results suggest that individuals previously treated for FOF with cognitive-behavioral therapy can maintain treatment gains in the face of a catastrophic fear-relevant event, even years after treatment is completed.     

Walking perception by walking observers

People frequently analyze the actions of other people for the purpose of action coordination. To understand whether such self-relative action perception differs from other-relative action perception, the authors had observers either compare their own walking speed with that of a point-light walker or compare the walking speeds of 2 point-light walkers. In Experiment 1, observers walked, bicycled, or stood while performing a gait-speed discrimination task. Walking observers demonstrated the poorest sensitivity to walking speed, suggesting that perception and performance of the same action alters visual-motion processes. Experiments 2-6 demonstrated that the processes used during self-relative and other-relative action perception differ significantly in their dependence on observers' previous motor experience, current motor effort, and potential for action coordination. These results suggest that the visual analysis of human motion during traditional laboratory studies can differ substantially from the visual analysis of human movement under more realistic conditions.     

Taking Ethical Disability Seriously

Aristotle's ethical theorizing contains resources for explaining what I call 'ethical disability'. In theories such as Kant's and Mill's it is important that criteria of right action be accessible to anyone. Aristotle's moral psychology yields a plausible account of how they are not available to everyone. Unless a correct appreciation of good is part of the agent's second nature, the agent will not recognize ethical requirements, and will not have the resources to alter his judgments. Often, bad action is not a matter of agents' flouting or violating criteria of right action that they recognize, but is a matter of agents' regarding as choiceworthy things that are in fact no good, and the agents are unable to appreciate this because of their vices. However, on the Aristotelian view, this is not a condition that diminishes responsibility, because of how voluntariness is interpreted. Some of the views of Susan Wolf and Bernard Williams are discussed in the development of this view of the moral landscape.