Expectancy Accessibility and the Influence of Outcome Expectancies on Adolescent Smokeless Tobacco Use

This study investigated the moderating influence of expectancy accessibility on the relation between outcome expectancies and drug use intentions. Specifically, it was hypothesized that expectancies made temporarily more accessible would predict smokeless tobacco intentions to a greater degree than would less accessible expectancies. In addition, it was anticipated that expectancies regarding positive outcomes of smokeless tobacco use would be better predictors of intention than would expectancies about negative outcomes. Results partially supported the accessibility hypothesis, but this effect occurred for positive outcome expectancies only. In addition, the anticipated prepotency of positive over negative expectancies in predicting drug use intentions was strongly supported. These findings are consistent with theories of problem behavior which differentiate between positive and negative outcome expectancies and which postulate that accessibility of expectancies plays an important role in expectancy-behavior relations.     

Impulse-control disorders in Parkinson's disease

Parkinson's disease is a neurodegenerative disorder characterized by bradykinesia, rigidity, postural instability, and resting tremor. Increasingly, Parkinson's disease has been associated with a broad spectrum of non-motor symptoms, such as olfactory loss, sleep disorders, autonomic dysfunction, cognitive impairment, psychosis, depression, anxiety, and apathy. In addition, a minority of Parkinson's disease patients develop compulsive behaviors while receiving dopamine-replacement therapy, including medication hoarding, pathological gambling, binge eating, hyperlibidinous behavior, compulsive shopping, and punding. These behaviors may result in psychosocial impairment for patients and therapeutic challenges for clinicians. This article reviews the anatomic substrates, behavioral spectrum, associated factors, and potential treatments for dopamine-replacement therapy-related compulsions in Parkinson's disease.     

Reporting ethical practices in journal articles

Little attention has focused on the reporting of ethical research practices in journal articles. In Study 1, published articles in 2 psychopathology journals were reviewed to ascertain the types of ethical research information that were reported. In Study 2, a survey was sent to authors in Study 1 to determine which ethical practices they engaged in, if they reported this information, and reasons for not including this information in their article. In general, there is a great variability regarding the types of ethical research practices reported in journal articles. Commonly cited reasons for not including ethical research practice information in the articles included the need for brevity, belief that it was common practice, and lack of relevance for the project. These results suggest that there is no standard practice for reporting research practices in journal articles and great variability in the implementation of procedures that are generally considered standard.     

The Experience of Crisis in Families of Individuals with Autism Spectrum Disorder Across the Lifespan

It is well-established that parents of individuals with autism spectrum disorder (ASD) experience significant stress in their caregiving role, and research findings indicate that chronic stressors can act as a precipitant to crisis. In the present study, we examined the experience of crisis in families of individuals with ASD from early childhood to adulthood. One hundred and fifty-seven comments provided by family members in response to an online survey were coded using grounded theory methods. We explored three components of crisis drawn from the comments: antecedents (precipitating events and the context of crisis), behaviors (the nature of crisis), and consequences (outcomes and reactions to crisis). Similarities and differences in the crisis experiences among varying age groups are discussed, as well as implications for practice and future research.     

Negative hysteresis in the behavioral dynamics of the affordance “graspable”

One commonly perceives whether a visible object will afford grasping with one hand or with both hands. In experiments in which differently sized objects of a fixed type are presented, the transition from using one of these manual modes to the other depends on the ratio of object size to hand span and on the presentation sequence, with size increasing versus decreasing. Conventional positive hysteresis (i.e., a larger transition ratio for the increasing sequence) can be accommodated by the order parameter dynamics that typify self-organizing systems (Lopresti-Goodman, Turvey, and Frank, Attention, Perception, & Psychophysics 73:1948–1965, 2011). Here we identified and addressed conditions of unconventional negative hysteresis (i.e., a larger transition ratio for the decreasing sequence). They suggest a second control parameter in the self-organization of affordance perception, one that is seemingly regulated by inhibitory dynamics occurring in the agent–task–environment system. Our experimental results and modeling extend the investigation of affordance perception within dynamical systems theory.     

Neurocognitive Sequelae of Pediatric Sickle Cell Disease: A Review of the Literature

This literature review summarizes all studies relating neuropsychological performance to neuroimaging findings in pediatric sickle cell disease (N=28; published 1991–2005). Although inconsistencies exist within and across domains, deficits in intelligence (IQ), attention and executive functions, memory, language, visuomotor abilities, and academic achievement have been identified. Overall neurocognitive compromise was revealed to be related to the level of neurological injury and the location of silent infarct. Attentional and executive dysfunction is prevalent and related to frontal lobe abnormalities.