Image analysis of small animal feeding behavior: An update

Recently we published a design for an automated feeding behavior system (Rowley, Stitt, & Hanson, 2003). One disadvantage of this system is that it relied on expensive, custom hardware. Here we present a modified version that replaces the custom hardware with a simple, commercially available webcam and modified the MATLAB analysis software as well. The new system is much less expensive and easier to implement, while still providing for bias-free collection of consumption data in a feeding behavior trial.     

Targeting Common Factors Across Anxiety and Depression Using the Unified Protocol for the Treatment of Emotional Disorders in Adolescents

Clinical approaches to mood and anxiety disorders in children and adolescents have historically been confined to either diagnosis- [e.g., for obsessive–compulsive disorder vs. generalized anxiety disorder (GAD), etc.] or domain-specific (e.g., for anxiety disorders vs. depressive disorders) treatments. However, as conceptualizations of mental illness shift towards a more dimensional model [e.g., the recent Research Domain Criteria (RDoC) from the National Institutes of Health], transdiagnostic treatments, such as the unified protocol for the treatment of emotional disorders in adolescents (UP-A; Ehrenreich et al. in Child Fam Behav Ther 31(1):20–37, 2008), are gaining support in the empirical literature. This paper reviews the common treatment targets across three emotional disorders commonly found in adolescence: GAD, social anxiety disorder, and major depressive disorder. In particular, similarities and differences across potential treatment mechanisms, including cognitive and information processing deficits, problem-solving difficulties, and avoidance strategies are examined. Finally, the case of 17-year-old “Andrea” is presented to demonstrate how transdiagnostic approaches like the UP-A can be effective in treating a range of emotional disorders in youth.     

Social risk and protective factors for African American children's academic achievement and adjustment during the transition to middle school

The transition to middle school is often marked by decreased academic achievement and increased emotional stress, and African American children exposed to social risk may be especially vulnerable during this transition. To identify mediators and protective factors, the authors related severity and timing of risk exposure to academic achievement and adjustment between 4th and 6th grade in 74 African American children. Longitudinal analyses indicated that severity more than timing of risk exposure was negatively related to all outcomes and that language skills mediated the pathway from risk for most outcomes. Transition to middle school was related to lower math scores and to more externalizing problems when children experienced higher levels of social risk. Language skills and parenting served as protective factors, whereas expectations of racial discrimination was a vulnerability factor. Results imply that promoting parenting and, especially, language skills, and decreasing expectations of racial discrimination provide pathways to academic success for African American children during the transition from elementary to middle school, especially those exposed to adversity.     

‘Window’ shopping and browsing opportunities in cyberspace

This article reviews the integral nature of browsing to the shopping experience and then explores the different types of browsing and searching that are supported in the online environment. Browsing contexts and episodes occur when consumers use browsers, URLs, search engines, menu categories and shopping bots to identify merchants and products. Browsing may be both intentional and unintentional, from the consumer's perspective, and controlled or uncontrolled, on the merchant's part. A matrix proposes four different categories of searching: partnership, consumer owned, merchant owned, and no‐one's land. These categories need to be taken into account when designing further research to profile browsing behaviour and to investigate the effect that it has on purchase decisions. Copyright © 2002 Henry Stewart Publications.     

Evaluating and developing a multidimensional, dispositional measure of appraisal

Although theories of stress have emphasized the critical role of the appraisal process, the use of dispositional measures of appraisal have not been readily investigated. Using a large multiethnic sample, we examined the factorial validity and dimensionality of a dispositional version of the Stress Appraisal Measure (SAM; Peacock & Wong, 1990). Both exploratory and confirmatory factor analyses resulted in a 4-factor representation of dispositional appraisal fitting better than its originally proposed 6-factor representation. This 4-factor model was invariant across gender groups. Although the 6-factor model purported to measure 3 dimensions of primary appraisal and 3 dimensions of secondary appraisal, these factors were found to be highly unstable and had questionable internal consistency. In contrast, the more parsimonious 4-factor solution identified 4 relative distinct and reliable scales of appraisal: 3 primary (Challenge, Threat, and Centrality) and 1 secondary (Resources). These findings suggest that meaningful dispositional dimensions of appraisal can be derived and incorporated into trait-state models of the stress process.     

Human symbolic matching-to-sample performance: Effects of reinforcer and sample-stimulus probabilities

Four experiments, each with 6 human subjects, varied the distribution of reinforcers for correct responses and the probability of sample-stimulus presentation in symbolic matching-to-sample procedures. Experiment 1 held the sample-stimulus probability constant and varied the ratio of reinforcers obtained for correct responses on the two alternatives across conditions. There was a positive relation between measures of response bias and the ratio of reinforcers. Experiment 2 held the ratio of reinforcers constant and varied the sample-stimulus probability across conditions. Unlike previous studies that used pigeons as subjects, there was a negative relation between bias and the ratio of sample-stimulus presentations. In Experiment 3, the sample-stimulus probability and the reinforcer ratio covaried across conditions. Response bias did not vary systematically across conditions. In Experiments 1 to 3, correct responses were reinforced intermittently. Experiment 4 used the same procedure as Experiment 3, but all correct responses now produced some scheduled consequence. There was a positive relation between response bias and the ratio of reinforcers. The results suggest that human performance in these tasks was controlled by both the relative frequency of reinforced responses and the relative frequency of nonreinforced responses.     

Illness perception ratings of high-risk newborns by mothers and clinicians: Relationship to illness severity and maternal stress

Objective: Patients' views of illness are often thought to differ from those of medical staff, although this is rarely assessed. This study examined the correspondence between mothers' and clinicians' perceptions of the same high-risk newborns, as well as with an objective measure of illness severity. We also investigated how mothers' perceptions were related to reported stress. Methods: Mothers of 99 high-risk infants admitted to either a neonatal intensive care or neonatal high dependency unit, which offers specialized but not intensive care, completed illness perception ratings of their baby's condition as well as perceived stress 3 to 5 days following admission. At the same time, a standardized measure of neonatal illness severity was calculated and the baby's primary neonatologist completed illness perceptions ratings. Results: Unlike clinician ratings, mothers' illness perceptions were not significantly correlated with illness severity. Mothers generally rated babies in both units as sicker and having a more serious illness than did neonatologists. Whereas clinicians, compared with mothers, rated babies in intensive care as having an illness that would affect their life more and last for a longer time. Mothers rated medical treatment to be significantly more helpful than did clinicians, particularly for babies admitted to the high dependency unit. Mothers' stress was significantly associated with illness perceptions but unrelated to illness severity. Conclusions: Significant differences exist in the perceptions of illness severity, helpfulness of treatment, and the long-term effects of the baby's illness between parents and clinicians and this may lead to misunderstandings and misinterpretations in communication. (PsycINFO Database Record (c) 2012 APA, all rights reserved).