Behavioral and motivational effects of immune-system activation

Immune-system activity induces changes in animal behavior such as decreased food intake, decreased exploratory behavior, increased sleep, and impaired cognitive functioning. These changes are mediated by proinflammatory cytokines, and the administration of cytokines produces the same profile of behavior change as do infection and inflammation. Results demonstrating differential effects of immune-system activation depending on environmental contingencies and physiological states support the hypothesis that the behavioral effects of immune activity may be mediated by motivation. In this article, the author outlines the behavioral changes induced by immune-system activation and discusses evidence for a motivational analysis of immune-induced behavior change and the potential involvement of motivation in human sickness behavior.     

Teaching history and systems from a clinical perspective

There is a need to make the teaching of the history and systems of psychology course more relevant for students in professional training programs. Most typical courses and textbooks are oriented around the history of the science of psychology, giving scant and generally passing attention to the development of the profession of psychology. The author draws on his experience teaching a history and systems course in PsyD programs and provides a structure for enhancing the relevancy of such courses in professional training programs. Two frameworks are used. The author develops a conceptualization of 4 archetypes as defining of the range of roles, activities, contexts, and justification of professional psychologists: (a) the shaman/priest, (b) the physician, (c) the teacher, and (d) the scientist. Stephen Pepper's (1942) world hypothesis theory, which characterizes the epistemic approaches underlying modern science and philosophy, is used to organize the development of the science of psychology. The integration of these 2 frameworks is discussed, and the circular modifications that flow from it are outlined.     

An evaluation of the quantity and quality of empirical research in three pastoral care and counseling journals, 1990-1999: has anything changed?

This article summarizes a review of all articles published in Pastoral Psychology, The Journal of Rleigion and Health, and The Journal of Pastoral Care between 1900 and 1999, identifying a total of 737 scholarly articles, of which 165 (22.4%) were research studies. The proportion of research studies, especially quantitative studies, increased significantly between the first and second half of the study period (p < .05). There was a significant positive correlation between compliance with three out of four criteria of internal validity. Three of five criteria of external validity were also positively related to one another. Compared to previous research using identical criteria to assess quantitative studies in the same journals in 1980-1989, the 1990-1999 sample showed improved compliance with respect to specifying the sampling method (p < .001), reporting the response rate (p < .05), and discussing the limitations of research studies (p < .001). However, the overall findings suggest that many researchers in the field do not have a sophisticated knowledge of statistical sampling, statistical analysis, or research design. Several recommendations for increasing the quality of quantitative research are offered.     

Cross-sectional studies of personality in a national sample: 2. Stability in neuroticism, extraversion, and openness

Data from the National Health and Nutrition Examination Survey (NHANES I) Epidemiologic Followup Study were used to examine age differences in neuroticism, extraversion, and openness to experience. Cross-sectional analyses of data from 10,063 respondents showed that older subjects were slightly lower in neuroticism, extraversion, and openness; that age trends were not curvilinear; and that there were no differences in personality scores that might be attributable to a mild-life crisis or transition. Comparison with data from 654 participants in the Augmented Baltimore Longitudinal Study of Aging (ABLSA) showed that the ABLSA sample was lower in extraversion and higher in openness than the national sample, although the differences were small in magnitude. Results were interpreted to mean that sampling and attrition in this longitudinal sample did not seriously bias results on these personality variables, and that cross-sectional findings from a large probability sample support the conclusion that personality is predominantly stable in adulthood.     

How children and adolescents spend time across the world: work, play, and developmental opportunities

The authors review studies on time use of children and adolescents around the world and discuss developmental implications of population differences. Industrialization and schooling are linked to dramatic declines in time spent on household and wage labor. This labor is often unchallenging, sometimes hazardous; developmental benefits often do not increase above a limited number of hours; hence, reduction in these activities opens time for activities that may be more developmentally beneficial. Adolescents in East Asian postindustrial societies spend this freed-up time in schoolwork, a use associated with lower intrinsic motivation but high achievement and economic productivity. Adolescents in North America spend more time in leisure, associated with greater self-direction but of an uncertain relation to development. Age, gender, and socioeconomic differences in activities and with whom time is spent are also considered.     

Differential effects of massage and heelstick procedures on transcutaneous oxygen tension in preterm neonates

The present study investigated the differential effects of heelsticks and tactile-kinesthetic massage on transcutaneous oxygen tension (TcPO₂) in preterm infants. The sample was comprised of 37 stabilized preterm neonates from the Neonatal Intensive Care Unit. During the heelstick procedure, TcPO₂ significantly declined an average of 14 mmHg. When compared to the tactile-kinesthetic massage, TcPO₂ levels during the heelstick (M = 39.8) were significantly lower than during the stimulation (M = 72.8). Mean TcPO₂ levels remained clinically safe during the four massage sessions evaluated. The TcPO₂ levels during kinesthetic stimulation were somewhat more varied, and movement and pressurization of the TcPO₂ electrode were investigated as possible artifactual explanations for this phenomenon. Overall, the findings indicate that social forms of touch such as tactile-kinesthetic massage do not appear to have a medically compromising effect on TcPO₂ in the preterm neonate. These findings are evaluated in relation to the “minimal touch” policy, and implications for future handling of the stabilized preterm neonate are discussed.     

Human spatial orientation in the pitch dimension

Two experiments were conducted. In Experiment I, each of eight Ss attempted to place himself at 13 different goal orientations between prone and supine. Deviations of achieved body pitch angles from goal orientations were determined. In Experiment II, each of eight Ss attempted to align a visual target with his morphological horizon while he was placed at each of the 13 goal orientations. Changes in settings of the target were examined. Results indicate that Ss underestimate body pitch when they are tilted less than 60 deg backward or forward from the vertical, overestimate body pitch when they are nearly prone, and accurately estimate body pitch when they are nearly supine. In contrast, Ss set the visual target maximally above the morphological horizon when they are tilted 30 deg forward from the vertical. The findings are discussed in terms of common and different physiological mechanisms that may underlie judgments of these types.