Effects of Electromyostimulation on Knee Extensors and Flexors Strength and Steadiness in Older Adults

It is known that electromyostimulation (EMS) alone or superimposed over voluntary contraction (EV) can effectively improve muscle strength. However, the effect of this type of training on the ability to control force production at submaximal levels is unknown. The authors examined the effects of EV training on steadiness in force production of knee extensors and flexors in older adults. Forty participants, including 20 men and 20 women, 60–77 years of age, were randomly allocated into a control group (CG) and an electromyostimulation superimposed over voluntary contraction (EVG) group. The EVG performed 30 bilateral isometric knee extension and flexion contractions per session, 3 training sessions per week, for 6 weeks. The variations in force production, expressed in absolute (standard deviation [SD]) and relative (coefficient of variation [CV]) terms, were assessed in isometric contractions at 5%, 15% and 25% maximal voluntary contraction (MVC) levels. Results indicated that MVC increased in knee extension and flexion in EVG (p < .05) after the training; steadiness CV also improved at 15% MVC in knee flexion (p < .05) but no significant changes were found in knee extension and steadiness SD. The training-induced changes in MVC were not correlated to steadiness CV that might indicate different mechanisms underlying these adaptations.     

Philosophical intervention and cross-disciplinary science: the story of the Toolbox Project

In this article we argue that philosophy can facilitate improvement in cross-disciplinary science. In particular, we discuss in detail the Toolbox Project, an effort in applied epistemology that deploys philosophical analysis for the purpose of enhancing collaborative, cross-disciplinary scientific research through improvements in cross-disciplinary communication. We begin by sketching the scientific context within which the Toolbox Project operates, a context that features a growing interest in and commitment to cross-disciplinary research (CDR). We then develop an argument for the leading idea behind this effort, namely, that philosophical dialogue can improve cross-disciplinary science by effecting epistemic changes that lead to better group communication. On the heels of this argument, we describe our approach and its output; in particular, we emphasize the Toolbox instrument that generates philosophical dialogue and the Toolbox workshop in which that dialogue takes place. Together, these constitute a philosophical intervention into the life of CDR teams. We conclude by considering the philosophical implications of this intervention.     

“We Always Spend Time Together on Sundays”: How Grandparents and Their Grandchildren Think About and Use Informal Learning Spaces

ABSTRACT

Self-reflection is critical for visitors to make sense of an exhibit collection in which they are the subject of investigation and may play an important role in any informal learning context. This study examines this construct by listening for self-reflective talk at Mind, an exhibit collection focused on helping visitors explore aspects of themselves rather than external objects or phenomena. It addresses 3 questions: (a) What does self-reflective talk sound like in such a collection? (b) What categories of self-reflective talk are prevalent? (c) What types of exhibits engender what categories of self-reflective talk? Findings indicate that self-reflective talk comes in various forms. Self-monitoring talk, including self-assessments about how visitors are feeling and doing and what they know, is more prevalent than self-connecting talk, comments about visitors’ own lives, values, and their sense of self. Comparisons among different types of exhibits suggest that exhibits designed for multiple users prompt high frequencies of self-connecting talk and self-monitoring talk, whereas interactive exhibits and exhibits that pose a challenge elicit high frequencies of self-monitoring but not self-connecting talk. Additional work is needed to better understand self-reflection, its role in informal learning, and effective means of fostering self-reflection in science museums.     

Play it again: neural responses to reunion with excluders predicted by attachment patterns

Reunion behavior following stressful separations from caregivers is often considered the single most sensitive clue to infant attachment patterns. Extending these ideas to middle childhood/early adolescence, we examined participants' neural responses to reunion with peers who had previously excluded them. We recorded event‐related potentials among nineteen 11‐ to 15‐year‐old youth previously classified on attachment interviews (11 secure and 8 insecure‐dismissing) while they played a virtual ball‐toss game (Cyberball) with peers that involved fair play, exclusion and reunion phases. Compared to secure participants, dismissing participants displayed a greater increment in the N2 during reunion relative to fair play, a neural marker commonly linked to expectancy violation. These data suggest a greater tendency toward continued expectations of rejection among dismissing children, even after cessation of social exclusion. In turn, the link between self‐reported ostracism distress and neural signs of negative expectancy at reunion was moderated by attachment, such that self‐reports were discordant with the neural index of expectancy violation for dismissing, but not for secure children. A video abstract of this article can be viewed at http://www.youtube.com/watch?v=qzoRel5c-4s .     

Psychological Hardiness and Adjustment to Life Events in Adulthood

Data were collected from 88 persons who had lost their jobs and 227 persons whose youngest child had left home to explore the impact of psychological hardiness on personal distress, adjustment, and coping strategies. Analyses controlling for numerous sociodemographic factors as well as NEO Neuroticism and Extroversion suggested that the interaction between overall hardiness and the experience of differential life events influenced the use of planful problem solving and positive reappraisal as coping mechanisms, as well as influencing levels of positive affect. In addition, a main effect for overall hardiness on several coping strategies, positive affect, and life satisfaction was obtained. Findings also suggested that job loss was a more stressful experience for adults in this study than was the empty nest. These data indicate that hardiness may mediate responses to life events that differ in terms of their predictability and anticipatory nature.     

Deliberate Self-Poisoning,Unemployment, and Public Health

The purpose of the present investigation was to explore further the known relationship between deliberate self-poisoning and social deprivation. Each individual who attended one of Cork city's three casualty departments following an act of deliberate self-poisoning in 1988 was examined. The place of residence (ward) of each city resident patient was established. The social status of the city's 34 wards was estimated using a number of indices obtained from the 1981 and 1986 census reports and social service records. A comparison was made between the 1988 self-poisoning rate for each ward and the rate found in a 1982 study of the city. Correlations between self-poisoning rate and seven social deprivation indices were found to be significant. Multiple regression, factor, and partial correlation analyses were carried out to examine more closely the interrelationships between the social deprivation indices. With respect to explaining the variation in the self-poisoning rate, unemployment alone performed almost as well as all of the indices together and as well as the factors derived using factor analysis. The correlation between unemployment and self-poisoning rate remained highly significant when the other related variables were controlled for. However, at fixed levels of unemployment, these variables were found to be independent of the self-poisoning rate. It is suggested that whereas clinical intervention may benefit the individual, deliberate self-poisoning as an issue requires a public health approach for its resolution.     

Longitudinal effects of retirement on men's well-being and health

The National Longitudinal Surveys of Labor Market Experience of Mature Men provided the opportunity to look at the effects of retirement on longitudinal well-being in a sample of men aged 54 to 69 in 1976. A conceptual model predicted that the decision to retire would affect subsequent well-being through the effect of retirement on such resources as income and health. The retirement decision in turn, was predicted to be a function of prior well-being and resources. Five categories of retirees were established: voluntary early age, voluntary normal age, health, mandatory, and discouraged. The analysis restricted the sample to men who were in the labor force at the 1976 interview, had not retired before that time, and who were interviewed in 1981. About half of the sample retired in the five years between interviews. Using several different measures of well-being, voluntary retirees were found to consider themselves better off than did other retirees or comparable men still working. Negative responses to retirement were concentrated among men who retired for health reasons, probably due to their continued ill-health. The effect of retirement on well-being seems highly related to the other circumstances (especially financial security and health) surrounding the individual, rather than to the event of retirement, per se.The research reported in this paper was conducted under a contract with the Employment and Training Administration, U. S. Department of Labor, under authority of the Comprehensive Employment and Training Act. Researchers undertaking such projects under government sponsorship are encouraged to express their own judgements. Interpretations stated in this report do not necessarily represent the official position or policy of the U. S. Department of Labor. This paper was presented to the 92nd annual convention of the American Psychological Association, Toronto, Ontario, Canada, August, 1984.     

Selective responsiveness of chronically ill children to assessments of depression.

Many investigators have noted that depression is a common symptom among pediatric cancer patients. However, prevalence rates vary widely across studies. This variation in prevalence rates may be due, in part, to selective reporting of patients based on measures used and environmental cues. In this study, we evaluated 50 chronically ill pediatric patients (19 cancer and 31 diabetic patients) for their use of selective reporting of depression. Factors in the 2 x 2 design were Intervention (disclosure videotape and cartoon videotape) and Examiner (familiar examiner and unfamiliar examiner). In the Intervention manipulation, subjects were shown either a videotape prompting the child that self-disclosure was appropriate or a tape of a cartoon (control condition). In the Examiner manipulation, subjects were administered the experimental measures by either a familiar (parent) or unfamiliar (research assistant) examiner. Dependent variables were the Children's Depression Inventory (CDI; Kovacs, 1981), the Depression scale of the Roberts Apperception Test for Children (RATC; McArthur & Roberts, 1982), and a depression measure taken from the Child Behavior Checklist (CBCL; Achenbach & Edelbrock, 1983). As hypothesized, the Examiner x Intervention interaction revealed that children who did not view the disclosure videotape and who were tested by an unfamiliar examiner gave significantly lower self-reports of depression on the CDI than children in the other conditions. However, parent and child projective reports of depression did not vary as a function of experimental condition. The results are interpreted as selective responding on the part of pediatric patients. Limitations of assessing internal psychological states in children are discussed.