Interplay of Biomechanical Constraints and Kinematic Strategies in Selecting Arm Postures

In this study, the authors examined the interplay between biomechanics and control strategies in the resolution of excess degrees of freedom at the joint level. Seven participants made aimed arm movements from 30 starting points and several starting postures to targets. Final arm postures for movements to a target exhibited substantial joint angle variation. Through regression modeling and by comparing observed final arm postures with biomechanically plausible postures, the authors identified 3 kinematic strategies: (a) Maintain deviations from the average angle at the starting point to the joint's final posture; (b) make torso rotations that are a fixed proportion of shoulder rotations; and (c) adopt a characteristic combination of 4 wrist-positioning approaches. The results demonstrated that kinematic strategies can account for substantial variance in final arm postures, if one takes into account 2 types of individual differences—those that arise inevitably from biomechanical constraints and those that reflect choices in movement strategy.     

Crafts as Leisure-Based Coping: Craft Makers’ Descriptions of Their Stress-Reducing Activity

The goal of this study was to explore how crafts help women, who do crafting as a leisure activity, cope with stress. This qualitative study is based on the narratives of 15 textile craft makers aged 27–57 who were reporting stress in work and non-work settings. The participants reported that their crafting varied depending on the specific life circumstances they encountered. The analysis revealed that crafts provided recreation, satisfaction, optimism, positive relationships, and support as well as helped participants to cope with negative feelings. Crafts served as a leisure-coping resource and a leisure-based coping strategy.     

Psychometric properties of the Coping Strategy Indicator (CSI) in a study of coping behaviour amongst malawian students

Abstract

The Coping Strategy Indicator (CSI; Amirkhan 1990) is an inductively derived measure of responses to adverse circumstances. Although seeking to isolate “a few fundamental strategies with wide applicability” (Amirkhan 1990). the initial validation studies were all based on Californian populations. The present study repork findings from completion of the CSI by 415 Malawian students as part of their enrolment health check up. Factor analysis (principal components analysis with varimax rotation) identified three factors with very similar structure and loadings to those identified by Amirkhan, namely, Support Seeking, Problem Solving and Avoidance. As with the initial validation study, there was some evidence of withdrawal and distraction forming identifiable sub-components of Avoidance. The CSI does appear to provide a measure of core coping strategies which is robust across cultural settings, the theoretical implications of which are considered. The influence of factors such as age and gender on CSI scores is discussed     

Forgiveness is an emotion-focused coping strategy that can reduce health risks and promote health resilience: theory,review, and hypotheses

Experimental evidence suggests that when people are transgressed against interpersonally, they often react by experiencing unforgiveness. Unforgiveness is conceptualized as a stress reaction. Forgiveness is one (of many) ways people reduce unforgiveness. Forgiveness is conceptualized as an emotional juxtaposition of positive emotions (i.e., empathy, sympathy, compassion, or love) against the negative emotions of unforgiveness. Forgiveness can thus be used as an emotion-focused coping strategy to reduce a stressful reaction to a transgression. Direct empirical research suggests that forgiveness is related to health outcomes and to mediating physiological processes in such a way as to support the conceptualization that forgiveness is an emotion-focused coping strategy. Indirect mechanisms might also affect the forgiveness-health relationship. Namely, forgiveness might affect health by working through social support, relationship quality, and religion.     

Beteendeterapi Vid Angest,Depression Och Smkrta

Davidson, P 0 (Ed) : The Behavioral Management of Anxiety, Depression and Pain. New York: Brunner/Mazel, 1976. 197 sid.     

协作抑制的认知机制

协作抑制是指当人们在一个记忆小组中一起提取信息的时候,小组提取的信息总量比等量个体提取的信息总量要少.心理学研究者致力于从认知角度对该现象进行解释,主要的理论解释有提取策略破坏假说和提取抑制假说.前者认为小组成员的提取结果对组内其他成员的信息组织策略产生了干扰,导致小组的提取成绩低.而后者认为小组内成员的提取结果会抑制其他成员对非提取项目的表征,降低小组协作提取能力,出现协作抑制.本文对两种理论假说的提出背景,基本观点,证据支持及现有争论进行了介绍,同时指出了未来的研究应关注于对两种机制的关键矛盾点进行区别性检验、对不同认知机制在不同条件下成立可靠性的检验以及通过对编码阶段进行操控来进一步考察协作抑制的认知机制.     

Adult age differences in subjective and objective measures of strategy use on a sequentially cued prediction task

Differences in strategy use are thought to underlie age-related performance deficits on many learning and decision-making tasks. Recently, age-related differences in learning to make predictions were reported on the Triplets Prediction Task (TPT). Notably, deficits appeared early in training and continued with experience. To assess if age differences were due to early strategy use, neural networks were used to objectively assess the strategies implemented by participants during Session 1. Then, the relationship between these strategies and performance was examined. Results revealed that older adults were more likely to implement a disadvantageous strategy early in learning, and this led to poorer task performance. Importantly, the relationship between age and task performance was partially mediated by early strategy use, suggesting that early strategy selection played a role in the lower quality of predictions in older adults.     

Ageing and attentional control

The research examines the structural bottleneck account and the resource account of the substantial dual-task deficits among older adults. Procedures from two common dual-task methodologies—the psychological refractory period and the relative-priority manipulation—were used to encourage maximization of the joint performance. Performance and time-sharing strategies from subjects between the ages of 20 and 70 years were examined. Age-related declines in time-sharing efficiency and in the precision of the executive control process were observed. The age-related effect was larger when two manual responses were required than when one manual and one vocal response were required, but no evidence for obligatory sequential processing was found. Except for the most demanding conditions, comparable practice effects were observed between the younger and older subjects, suggesting considerable cognitive plasticity in the older subjects. Implications for the two attentional accounts were discussed.     

延迟满足情境中2岁儿童对行为的自我控制能力和延迟策略的使用

以2岁儿童为被试,探讨其在延迟满足情境中的自我控制能力发展的状况。结果表明:(1)2岁儿童已具有一定程度的自我控制能力,个体差异显著,性别差异不显著;(2)2岁儿童已能使用一定的延迟策略,包括问题解决、分心、寻求安慰、消极等待、寻求他人帮助、回避等,其中使用频率最高的是分心策略;(3)不同的策略对延迟时间有着不同的影响;(4)儿童对策略的使用不会因延迟满足情境的不同而出现显著差异。     

超出预期策略的实验研究

在先前论文中提出与心理匹配策略相应的,又一用以调节学生学习新材料的学习心向的超出预期策略基础上,本文将该策略运用于数学教学之中,进行现场的教学实验研究。研究结果表明：在数学教学中可以运用超出预期策略对教材内容进行情感性处理,且对调节学生学习心向,提高认知学习的质量是有效的。