Restricted environmental stimulation therapy in the treatment of essential hypertension

Restricted Environmental Stimulation Therapy (REST) has been useful in treating a variety of health-related problems, including obesity and cigarette smoking. The pilot project described in this paper used 24 hr of REST (darkness and silence) with four patients suffering from essential hypertension. Long-term changes have included lower blood pressure, a reduced need for medication, and improved coping with stressful life events.     

Laurence Foss and Kenneth Rothenberg. The Second Medical Revolution. Form Biomedicine of Infomedicine

Theoretical Medicine and Bioethics -     

Race matters: the relation between race and general campus climate

This study examined students' perceptions of racial and academic climate as possible mediators of racial differences in the perception of the university's general campus climate (GCC). African American (n = 182), Latino (n = 212), Asian American (n = 358), and White (n = 671) students evaluated their perception of racial, academic, and general campus climates. As expected, racial minority students, particularly African Americans, perceived more negative general campus, racial, and academic climates than White students. Somewhat contrary to prediction, results indicated that racial differences in the perception of GCC were more closely related to perceptions of the academic than racial climate for members of all racial groups at all educational levels. Students' academic and racial experiences were the best predictors of their perception of GCC.     

Choice in a variable environment: effects of unequal reinforcer distributions

Six pigeons were trained in a procedure in which sessions included seven unsignaled components, each offering two pecking keys, and each providing a potentially different reinforcer ratio between the two keys. Across conditions, various combinations of reinforcer ratios and reinforcer-magnitude ratios were used to create unequal reinforcer distributions between the two alternatives when averaged across a session. The results extended previous research using the same basic procedure that had included only reinforcer distributions symmetrical around 1:1. Data analyses suggested that the variables controlling choice operated at a number of levels: First, individual reinforcers had local effects on choice; second, sequences of successive reinforcers obtained at the same alternative (continuations) had cumulative effects; and, third, when these sequences themselves occurred with greater frequency, their effects further cumulated. A reinforcer obtained at the other alternative following a sequence of continuations (a discontinuation) had a large effect and apparently reset choice to levels approximating the sessional reinforcer ratio.     

Evaluation of outcome in school consultation

To further understanding regarding how content of change, degree of change, and initial level of functioning influence consultants' evaluation of consulation outcome, 14 mental health consultants completed a questionnaire. For each of the 18 prepost consultation ratings on the questionnaire (2 context × 3 degrees of change × 3 initial levels = 18), consultants rated the success of consultation and the degree to which they would like to have been the consultant. Analysis of variance results for both dependent measures indicate main effects for degree of change and initial level. Neither main effects for content nor interaction effects are indicated. It appears that consultants perceive consultation as more successful with and prefer working with consultees who improve the most and who function at a higher initial level.     

Concurrent schedules: short- and long-term effects of reinforcers

Five pigeons were trained on concurrent variable-interval schedules in a switching-key procedure. The overall rate of reinforcement was constant in all conditions, and the ratios of reinforcers obtainable on the two alternatives were varied over seven levels. Each condition remained in effect for 65 sessions, and the last 50 sessions of data from each condition were analyzed. The most recently obtained reinforcer had the largest effect on current preference, but each of the eight previously obtained reinforcers had a small measurable effect. These effects were larger when the reinforcer ratio was more extreme. A longer term effect of reinforcement was also evident, which changed as a function of the reinforcer ratio arranged. More local analyses showed regularities at a reinforcer-by-reinforcer level and large transient movements in preference toward the just-reinforced alternative immediately following reinforcers, followed by a return to stable levels that were related to the reinforcer ratio in effect. The present data suggest that the variables that control choice have both short- and long-term effects and that the short-term effects increased when the reinforcer ratios arranged were more extreme.     

Auditory spatial attention capture,disengagement, and response selection in normal aging

Attention control is a core element of cognitive aging, but the specific mechanisms that differ with age are unclear. Here we used a novel auditory spatial attention task to evaluate stimulus processing at the level of early attention capture, later response selection, and the lingering effects of attention capture across trials in young and older adults. We found that the shapes of spatial attention capture gradients were remarkably similar in young and older adults, but only the older group had lingering effects of attention capture on the next trial. Response selection for stimulus-response incompatibilities took longer in older subjects, but primarily when attending to the midline location. The results suggest that the likelihood and spatial tuning of attention capture is comparable among groups, but once attention is captured, older subjects take longer to disengage. Age differences in response selection were supported, but may not be a general feature of cognitive aging.     

Ratings of Test Fairness by Human Resource Professionals

The authors provide a methodology for capturing policies for rating test fairness. Guided by the test fairness models that appeared in the psychological literature of the 1970s, test fairness evaluations are modeled as a function of a test's validity coefficient, the mean test score difference between the majority group and the minority group, and the test score adjustment for the minority group. Fifty‐seven participants with graduate education in human resource management rated fairness for 20 stimuli. Preference modeling was used to estimate each participant's fairness policy. Results showed that the variation in fairness ratings attributable to differences in ratings policies among participants (40.4%) was almost equal to the variation explained by attribute main effects, demonstrating that test fairness is a controversial issue even among a homogeneous set of participants. The authors discuss the implications of this type of research may have for public policy and the use of group‐based test score adjustments.