A stochastic detection and retrieval model for the study of metacognition

We present a signal detection-like model termed the stochastic detection and retrieval model (SDRM) for use in studying metacognition. Focusing on paradigms that relate retrieval (e.g., recall or recognition) and confidence judgments, the SDRM measures (1) variance in the retrieval process, (2) variance in the confidence process, (3) the extent to which different sources of information underlie each response, (4) simple bias (i.e., increasing or decreasing confidence criteria across conditions), and (5) metacognitive bias (i.e., contraction or expansion of the confidence criteria across conditions). In the metacognition literature, gamma correlations have been used to measure the accuracy of confidence judgments. However, gamma cannot distinguish between the first 3 attributes, and it cannot measure either form of bias. In contrast, the SDRM can distinguish among the attributes, and it can measure both forms of bias. In this way, the SDRM can be used to test competing process theories by determining the attribute that best accounts for a change across conditions. To demonstrate the SDRM's usefulness, we investigated judgments of learning (JOLs) followed by cued-recall. Through a series of nested and non-nested model comparisons applied to a new experiment, the SDRM determined that a reduction in variance during the confidence process is the most likely explanation of the delayed-JOL effect, and a stronger relation between information underlying JOLs and recall is the most likely explanation of the testing-JOL effect. Following a brief discussion of implications for JOL theories, we conclude with a broader discussion of how the SDRM can benefit metacognition research.     

Behavioral training and predisposed coping strategies interact to influence resilience in male Long-Evans rats: implications for depression

Effective coping strategies and adaptive behavioral training build resilience against stress-induced pathology. Both predisposed and acquired coping strategies were investigated in rats to determine their impact on stress responsiveness and emotional resilience. Male Long-Evans rats were assigned to one of the three coping groups: passive, active, or variable copers. Rats were then randomly assigned to either an effort-based reward (EBR) contingent training group or a non-contingent training group. Following EBR training, rats were tested in appetitive and stressful challenge tasks. Physiological responses included changes in fecal corticosterone and dehydroepiandrosterone (DHEA) metabolites as well as neuropeptide Y (NPY)-immunoreactivity in the hippocampus and amygdala. Regardless of a rat's predisposed coping strategy, EBR rats persisted longer than non-contingent rats in the appetitive problem-solving task. Furthermore, training and coping styles interacted to yield the seemingly most adaptive DHEA/corticosterone ratios in the EBR-trained variable copers. Regardless of training group, variable copers exhibited increased NPY-immunoreactivity in the CA1 region.     

Neuropsychological and neurophysiological effects of strengthening exercise for early dementia: a pilot study

Research demonstrates a positive effect of aerobic exercise on cognitive functioning in older adults. Unfortunately, aerobic exercise is often contraindicated for older adults due to cardiovascular and functional limitations. Low-intensity strengthening exercise may offer a practical alternative, but the neuropsychological benefits and potential neurophysiological mechanisms are less well understood. The current study evaluated the effects of a 10-week strengthening exercise intervention on cognitive functioning and EEG in a sample of 13 older adults with early dementia, and 9 normative controls. Results revealed beneficial effects of strengthening exercise on verbal memory coupled with frontal beta and delta power asymmetries and N200 amplitude asymmetry. Results point to increased cognitive efficiency following 10 weeks of strengthening exercise. The findings suggest it is feasible to conduct a strengthening intervention with early dementia patients, and to gather neuropsychological and neurophysiological data to evaluate outcomes. Strengthening exercise may serve as a useful alternative to aerobic exercise.     

Coercion in Groups: Finding One's Voice; Knowing One's Mind

Groups develop standards to facilitate their function and yet the standards that evolve are not always in line with the explicit task of the group. Group pressures and anxieties can move towards relief of strain in ways that may actually oppose the group's intended goals. The larger the group, the more difficult it may be to catch hold of relatively invisible coercive forces that guide behaviour. As Bion (1977 Bion, W. R. 1977. Seven Servants, New York: Jason Aronson.  [Google Scholar]) notes, group pressures tend to move towards cohesion and tradition, and away from the new idea that ultimately might be productive but would also be disregulating. Although clinicians learn about tensions between the individual and the group from a theoretical perspective, engaging with these tensions actively and reflectively can enhance both our understanding and our practice, as we discover ways in which we are buffeted by and at times succumb to these same processes. As a way of considering some of the more subtle ways in which we may find ourselves behaving out of line with our own integrity in relation to encounters with implicit group demands, I will use some of my own experiences in a group setting to highlight and illustrate some of these coercive forces that may work against the integration of new ideas in group settings.     

Forgiveness intervention for female South Korean adolescent aggressive victims

We investigated an intervention designed to help female aggressive victims improve their levels of psychological and school adjustment. Adolescent aggressive victims are youth who demonstrate heightened levels of aggressive behavior and are frequently victimized by others. A program focused on the psychology of forgiveness was implemented and tested against both an alternative skillstreaming program and a no-treatment control group. Forty-eight female adolescent aggressive victims in South Korea (age 12 to 21 years) were recruited from a middle school and a juvenile correctional facility. Participants were randomly assigned to groups. Both forgiveness and skillstreaming interventions were implemented in a small-group format for 12 weeks. Participants in the forgiveness group reported significant decreases in anger, hostile attribution, aggression, and delinquency at post-test and follow-up; they also reported significant increases in empathy at post-test and follow-up and grades at post-test. We discuss implications for the psychological development of adolescent aggressive victims.     

Approaching Homelessness: An Integral Re-Frame

This article explores a metaview of the many faces of homelessness. It analyzes an evolutionary meaning of home and suggests that ever-complexifying life conditions influence how societies enforce conformity to the status quo of homefulness. It goes on to describe how homelessness might be reframed as a complex adaptive form of survival for diversity generators who cannot or will not conform to the status quo. The article proposes an integral framework on which intervention strategies could be structured to provide evolutionary, appropriate, and flexible approaches to homelessness.     

Aging and Working Memory Inside and Outside the Focus of Attention: Dissociations of Availability and Accessibility

ABSTRACT

Two experiments used the N-Back task to test for age differences in working memory inside and outside the focus of attention. Manipulations of the difficulty of item-context binding (Experiment 1) and of stimulus feature binding (Experiment 2) were used to create conditions that varied in their demand on working memory, with the expectation that greater demand might increase age differences in focus-switching costs and the search rate outside the focus of attention. Results showed, however, that although age differences were evident in measures of overall speed and accuracy, and the manipulations significantly affected response times and accuracy in the expected direction, the experimental manipulations had no impact on age differences. Findings instead pointed to age-related reductions in accuracy but not speed of focus-switching and search outside the focus of attention. Thus, age-related deficits appear to involve the availability of representations in working memory, but not their accessibility.