Mood enhancement persists for up to 12 hours following aerobic exercise: a pilot study

The objective was to estimate the duration of the effects of aerobic exercise on mood. Healthy men (n = 13) and women (n = 35) ages 18 to 25 years (M = 20.2, SD = 3.4) were randomly assigned to either a control or exercise group. Participants completed the Profile of Mood States before, after, and at 1, 2, 4, 8, 12, and 24 hours following either exercise at 60% VO2 peak or quiet rest. Repeated-measures analysis of covariance was utilized with VO2 peak entered as a covariate. The exercise group showed significantly lower total mood disturbance immediately after and at 4, 8, and 12 hours following exercise.     

How does evidence-based practice in psychology work? – As an ethical demarcation

Evidence-based practice in psychology (EBPP) is ordinarily understood to demarcate between legitimate and illegitimate psychotherapy practice, based upon the epistemic demarcation distinguishing scientific from non-scientific knowledge. EBPP emphasizes the value of effective and efficient interventions identified through randomized controlled trials and cost-benefit analyses. Basing the template for choice of action or strategy on randomized controlled trials and cost-benefit analyses create a deceptive appearance of ethical neutrality. However, there is an implicit ethical demarcation at work in EBPP, which favors a non-articulated specific position in normative ethics. More particularly, evidence-based practice in psychology is structured according to a utilitarian framework, severely limiting the kinds of ethical perspectives available to assess psychotherapy practice. The latter point is illustrated through a new mode of delivering psychotherapy services called “Internet-based guided self-help” (IBGSH). In EBPP the only relevant ethical question is to what extent any intervention, such as IBGSH, is effective and efficient. Some of the limiting effects of the ethical, utilitarian, demarcation are showcased by presenting three alternative ethical perspectives by which psychotherapy practice in general and IBGSH in particular can be analyzed. The analysis concludes that EBPP is not suited to ethically regulate the practice of psychotherapy.     

The backward span of the Corsi Block-Tapping Task and its association with the WAIS-III Digit Span

The Corsi Block-Tapping Task measures visuospatial short-term and working memory, but a standardized backward condition is lacking. The authors present a standardized backward procedure that was examined in 246 healthy older adults (ages 50 to 92), comparing the results with the Digit Span subtest of the Wechsler Adult Intelligence Scale--Third Edition. Principal component analysis resulted in a two-factor model, dissociating a verbal and a spatial working-memory factor. Also the Corsi backward is not more difficult than the Corsi forward, in contrast to the Digit Span backward that is more difficult than the Digit Span forward. This may suggest that the Corsi Block-Tapping Task backward task relies on processing within working-memory's slave systems, whereas the Digit Span backward also relies on the central executive component of working memory. Finally, regression-based normative data and cutoff scores for older adults are presented for use in clinical practice.     

A COMPUTATIONAL THEORY OF SELECTION BY CONSEQUENCES APPLIED TO CONCURRENT SCHEDULES

Virtual organisms animated by a computational theory of selection by consequences responded on symmetrical and asymmetrical concurrent schedules of reinforcement. The theory instantiated Darwinian principles of selection, reproduction, and mutation such that a population of potential behaviors evolved under the selection pressure exerted by reinforcement from the environment. The virtual organisms' steady‐state behavior was well described by the power function matching equation, and the parameters of the equation behaved in ways that were consistent with findings from experiments with live organisms. Together with previous research on single‐alternative schedules (McDowell, 2004; McDowell & Caron, 2007) these results indicate that the equations of matching theory are emergent properties of the evolutionary dynamics of selection by consequences.     

Be Prestige-Resilient! A Contextual Ethics of Cultural Identity

This article proposes a new social- and moral-psychological understanding of cultural identity, tailored to the mixed multicultural contexts of every major city today. Seeking to protect vulnerable cultural groups, theories of multiculturalism have insufficiently assessed the psychological significance of intercultural social comparison, in identity-formation. While plays of prestige are a fact of life for immigrant and gay minorities, not everyone is equally able to cope with ascribed negative prestige. This is shown in an analysis of reactive attitudes towards negative prestige under contrasting conditions (of rough cultural equality, and in underclass-culture). The idea of prestige-resilience is proposed both as an explanatory concept in the debate on underclass-culture and as a normative concept from which basic moral and ethical thresholds for cultural identity-formation might be deduced. Outcomes are considered relevant for psychological analysis of underclass-formation and for multicultural policy-making, specifically in immigrant states.     

Youth Action Research for Prevention: A Multi-level Intervention Designed to Increase Efficacy and Empowerment Among Urban Youth

Youth Action Research for Prevention (YARP), a federally funded research and demonstration intervention, utilizes youth empowerment as the cornerstone of a multi-level intervention designed to reduce and/or delay onset of drug and sex risk, while increasing individual and collective efficacy and educational expectations. The intervention, located in Hartford Connecticut, served 114 African-Caribbean and Latino high school youth in a community education setting and a matched comparison group of 202 youth from 2001 to 2004. The strategy used in YARP begins with individuals, forges group identity and cohesion, trains youth as a group to use research to understand their community better (formative community ethnography), and then engages them in using the research for social action at multiple levels in community settings (policy, school-based, parental etc.) Engagement in community activism has, in turn, an effect on individual and collective efficacy and individual behavioral change. This approach is unique insofar as it differs from multilevel interventions that create approaches to attack multiple levels simultaneously. We describe the YARP intervention and employ qualitative and quantitative data from the quasi-experimental evaluation study design to assess the way in which the YARP approach empowered individual youth and groups of youth (youth networks) to engage in social action in their schools, communities and at the policy level, which in turn affected their attitudes and behaviors.     

The nucleus premammillaris ventralis (pmv) and aggressive behavior in the rat

Small bilateral electrolytic lesions placed just posterior of the ventromedial hypothalamic nucleus cause a strong increase in offensive behavior. The histology suggests that damage to the ventral premammillary nucleus is responsible for this effect. A summary of the neuroanatomical literature shows that this structure is connected to most other brain structures reported to be involved in offensive behavior.