Contributions of the human pulvinar to linking vision and action

In 3 patients with unilateral pulvinar lesions, we tested the pulvinar’s role in selective attention processing. Each patient completed four variants of a flanker interference task in which they reported the color of a square of a specified size while ignoring an irrelevant flanker that appeared either contralesionally or ipsilesionally to the target. The main finding was that when target location was not known and target and flanker were associated with competing responses, reaction times to contralesional targets were longer than those to ipsilesional targets. Our findings suggest that pulvinar damage produces a contralesional deficit in response competition.     

The role of the left hemisphere in motor control of touch: a functional magnetic resonance imaging analysis

Previous research using a simple finger-touching task has shown greater blood oxygenation level dependent (BOLD) activation volume in the motor cortex of the right hemisphere for contralateral finger touching compared to ipsilateral finger touching, but no significant contralateral advantage for the left hemisphere. Such equal involvement of the left hemisphere for both contralateral and ipsilateral finger touching suggests a special role of the left hemisphere for finger touching. In contrast, we found a contralateral advantage in the motor cortex of both hemispheres in a majority of participants (14/16) when consistently activated BOLD volumes were examined. However, participants who did not show a clear contralateral advantage for the left hemisphere did show activation in the left inferior frontal gyrus (IFG; Broca's Area) and in the left insular cortex, which suggests that verbally mediated sequencing of finger movements can account for our less frequent result.     

The role of spatial configuration in tests of working memory explored with functional neuroimaging

While the importance of the prefrontal cortex for "higher-order" cognitive functions is largely undisputed, no consensus has been reached regarding the fractionation of functions within this region. Several recent functional neuroimaging studies have suggested that the mid-ventrolateral frontal cortex may play an important role in various aspects of human memory. Thus, similar patterns of activation have been observed in this region during analogous spatial, verbal and visual span tasks. In the present study, however, activation was observed in a more dorsolateral region of the lateral frontal cortex during a modified version of the spatial span task, which differed only in the spatial configuration of the array employed. The results of a supplementary behavioral study, designed to investigate this effect further, suggest that in spatial memory tasks certain stimulus configurations may encourage subjects to adopt mnemonic strategies, which may depend upon dorsolateral, rather than ventrolateral, regions of the frontal cortex. These findings shed further light on the functional relationship between dorsal and ventral regions of the lateral frontal cortex and, more specifically, how the "executive" processes assumed to be dependent upon these regions might contribute to aspects of human memory.     

Anxiety in rats selectively bred for Fast and Slow kindling rates: situation-specific outcomes

Rats selectively bred for amygdala excitability, realized by fast or slow kindling epileptogenesis, were previously reported to exhibit differential levels of anxiety. Although the Slow kindling rats generally appeared more anxious in several behavioral tests, under certain test conditions the Fast kindling rats displayed greater anxiety or stressor reactivity. The present investigation confirmed that in a test of anxiety comprising suppression of consumption of a palatable snack in an unfamiliar environment, the Slow kindling rats exhibited greater anxiety and that this effect was attenuated by diazepam. Likewise, the acoustic startle response was greater in the Slow kindling rats. However, the fear-potentiated startle response was more pronounced in Fast kindling rats, particularly among females, irrespective of whether the test parameters elicited moderate or high startle amplitudes. The elevated startle in the Slow rats, and the fear potentiated startle in the Fast rats, were attenuated by diazepam. These data indicate the need to differentiate subtypes of anxiety in animal models, and raise the issue that anxiety elicited by specific environmental triggers may interact with genetically determined trait characteristics.     

The incremental variance problem: enhancing the predictability of academic success in an urban, commuter institution

The authors identified variables that enhance the predictability of academic performance and retention in an urban, commuter college. They used a longitudinal design with 2 waves of data collection: prior to 1st-semester attendance and again 6 semesters later. The results support the following conclusions: (a) After controlling for precollege indices of academic ability, specific variables within demographic, personal behavior, expectations, and attitudinal domains improved the predictability of grade point average by 15.5% for Whites and 20.3% for Blacks; overall, these analyses accounted for 61% of the variance in grade point average for Whites and 47% for Blacks; (b) for retention, the comparable increment in predictability was 2.5% for Whites and less than 1% for Blacks; overall, the percentage of retention variance accounted for was 42% for Whites and 29% for Blacks; and (c) a paradoxical finding was the combination of a positive correlation between high school average and students' expected grades on tests and a negative correlation between expected and actual grades. The paradox is resolved by citing data that demonstrate (a) a disparity between high school grades and independently measured academic accomplishment; (b) the consequent false attributions students draw about their academic abilities; and (c) the impact of these false attributions on the priority students place on their academic responsibilities.     

Introducing an existential-phenomenological approach: Basic phenomenological theory and research–Part I

What is often referred to as the existential approach to counselling and psychotherapy may be defined as the application of existential-phenomenological philosophy towards psychotherapeutic ends, in which individual practitioners choose how to apply their readings of the leading authors. The first of this two-part exposition introduces a form of ‘experiential’ philosophy called phenomenology, a regular experiential method that is in many ways antithetical to the conventional scientific approach. This first paper concentrates on one of the many successive definitions of phenomenology given by Husserl, the philosopher of science, in 1927, with help from his ex-student Heidegger. In the second paper, phenomenology is brought to bear on human experience, and it is Heidegger in Being and Time who added it to the writings of the earlier existentialists Kierkegaard and Nietzsche; to produce existential psychology and philosophy. Also in the second part, three forms of existential therapy are briefly mentioned. This first paper introduces a handful of key ideas for counselling psychologists, and illustrates how philosophical work is an inherent part of life, as well as the production and use of psychological knowledge.     

Vocal disinhibition (grunting) does not increase dead lift force in college athletes or nonathletes.

31 17-35 yr.-old men (15 college athletes and 16 nonathletes) performed three dead-lifts with and three without grunting, the order of which was randomly assigned. No differences were found across the grunting trials and grunting did not affect maximal force production. Grunting does not appear to increase maximum force production significantly during a large muscle group, force output activity (isometric dead lift).     

The Contribution of Perceived Fitness to Physiological and Self-Reported Responses to Laboratory Stress

This study sought to evaluate the contribution of perceived physical fitness beyond the contributions of gender, body mass index (BMI), defensiveness, and estimated aerobic fitness on both physiological and self-reported stress responsivity to laboratory-induced stress. Ninety healthy individuals (45 males, 45 females) participated in the experiment. Participants completed a laboratory procedure measuring cardiovascular responses (i.e. pulse rate and blood pressure) and self-reported rating of anxiety (i.e. the anxiety scale from the Multiple Affective Checklist–Revised—MAACL–R) while performing stressful laboratory tasks (i.e. the Stroop Color Naming Test and Serial 7's). Estimated aerobic fitness (i.e. VO₂max using the Bruce protocol) as well as perceived fitness (using a 10-point Likert scale) were also determined. Multiple regression and effect size results revealed that perceived fitness significantly contributed to the variance associated with both physiological and self-reported responses to laboratory stress. Specifically, perceived fitness significantly added to the variance beyond that attributed to gender, BMI, defensiveness, and estimated aerobic physical fitness while assessing pulse rate and MAACL–R anxiety scores. Overall results support the view that perception of fitness may be an important factor above and beyond aerobic fitness in its association with physiological and self-reported responses to stress.     

Stress Buffers and Dysphoria in a Non-Western Population

The authors investigated whether generalized self-efficacy (GSE), positive automatic thoughts, optimism, or self-mastery moderated the relationship between stressful life events and dysphoria among students from Guam. The GSE Scale, the Automatic Thoughts Questionnaire—Positive, the Life Orientation Test, the Self-Mastery Scale, the Life Experiences Survey, the Beck Depression Inventory, and the Automatic Thoughts Questionnaire were administered to 63 Guamanian undergraduates twice over 3 months. GSE, optimism, and the GSE × Negative Life Events interaction predicted unique variance in dysphoria. Persons with greater GSE tended to remain nondysphoric even when experiencing higher life stresses, whereas persons with lower GSE tended to become dysphoric under high stress conditions. This is consistent with the hypothesis that GSE may help to buffer the effects of stress among Guamanians. Persons with higher optimism tended to be less dysphoric regardless of the level of stress, compared with persons with lower optimism.     

Boundaries in the practice of humanistic counselling

The multifaceted concept of boundary is used to describe the ground rules, quality and type of therapeutic relationship in a humanistic form of counselling that develops some of the principles of Carl Rogers and blends them with principles from psychodynamic practice. The concept of boundaries is first discussed in relation to its usages and practical consequences. An analysis of some core principles and assumptions about boundaries that guide the communicative psychotherapy approach of Robert Langs leads into a comparison with person-centred counselling. The aim is to develop a middle path for humanistic practice along more formal lines, involving a more fluid understanding of relationships and precise use of counselling principles. This also involves finding aspects of agreement between the psychodynamic and humanistic styles of working, by omitting some concepts and practices and identifying areas of common ground. Several comments on practice are made by comparing the two perspectives. The concept of boundary enables counsellors of all schools to think about points of similarity and difference. Finally, the notion of boundary itself is critiqued, and intersubjectivity is proposed as a potentially more meaningful term.