A prospective study of pressures from parents, peers, and the media on extreme weight change behaviors among adolescent boys and girls

The current study was designed to evaluate the role of sociocultural influences over a 16 month period on strategies to lose weight, extreme weight loss strategies, and strategies to increase muscles among adolescent boys (n=344) and girls (n=246). All participants completed measures of body dissatisfaction, body image importance, strategies to lose weight, extreme weight loss strategies, and strategies to increase muscles. Measures of perceived pressure to lose weight or increase muscles from mother, father, best male friend, best female friend and the media were also evaluated. Data were gathered on three occasions, 8 months apart. The results demonstrated that boys showed a decrease in strategies to lose weight and increase muscles over time, whereas girls showed an increase. Both boys and girls showed an increase in extreme weight loss strategies with girls demonstrating a greater increase than boys. The sociocultural influences generally were perceived by girls to relate to messages to lose weight, whereas for boys they were perceived to relate to increasing muscles. Messages from parents, particularly fathers, were strong predictors of both strategies to lose weight and increase muscles among boys, with the media and best male friend playing a limited role. For girls, the strongest influences were mothers and best female friends, with few influences from fathers or the media. The results of this study are discussed in terms of the importance of the various sociocultural influences in shaping body change strategies among young adolescent boys and girls, and the implications of these findings for intervention programs for adolescents.     

空间路线学习中的前向测试效应

空间路线信息学习中的前向测试效应及其机制有待检验。研究以虚拟背景下的住宅小区为实验材料, 要求被试学习同一场景4个方向的路线信息(实验1)以及4个不同场景(实验2)的路线信息。结果表明, 在路线1~3的测试中, 同一场景下路线信息相似性高, “隔离”干扰的难度大, 在测试过程中的干扰率高于不同场景的路线信息。在路线4的测试中, 两个实验中测试组的回忆正确率均显著高于重学组, 干扰率则显著低于重学组, 出现了前向测试效应。这些发现表明, 测试可以通过“隔离”来自先前学习信息的前摄干扰来增强后续空间信息的学习。研究结果揭示了空间路线学习中的前向测试效应及其机制, 支持前摄抑制减少理论, 证实了前向测试效应在生活中具有广阔的应用性。     

中医大处方中西汇通思考

中医大处方合理思路:一是在辨证论治基础上对症加减化裁治疗;二是治疗某一疾病非对立证型的两个或几个方剂的有机组合,治疗同一疾病不同证型的这几个方剂对其病的指标都有改善作用,有机组合后产生协同叠加作用.     

反安慰剂效应在临床试验中的研究

临床工作中,患者在服药后有时会出现一些不良反应,其中有些是由于药物的特殊药理作用导致的,但也有一些属于非特异性的不良反应.近些年来,随着对安慰剂效应研究的逐步深入,人们越来越注意到,“意识”在不良反应的发生中也起到了重要的作用,即反安慰剂效应的作用.本文将从几个不同方面阐述反安慰剂效应的作用及影响因素,并讨论应如何认识、处理临床冶疗和临床试验中反安慰剂效应的问题.     

正念训练对康复期精神分裂症患者抑制控制的影响

探究正念训练对康复期精神分裂症患者正念觉知水平和抑制控制能力的影响。选取54名康复期精神分裂症住院患者随机分为正念组和对照组。对照组予以常规康复治疗,正念组在常规康复治疗基础上进行8周正念训练。结果发现：（1）在正念觉知方面,正念组后测得分显著高于前测,对照组前后测得分无显著差异;正念组后测得分显著高于对照组。（2）在抑制控制方面,正念组后测Stroop任务反应时显著低于前测,对照组前后测反应时无显著差异;正念组后测反应时显著低于对照组。结果表明,正念训练有助于提高康复期精神分裂症患者正念觉知水平和改善其抑制控制能力。     

抑制范式下的情绪注意偏向

与中性信息相比,情绪信息会引起更快更多的注意并具有一种认知加工上的优先权.在注意实验中,与不带情绪色彩的刺激相比,具有情绪意义的刺激更能吸引注意或占用注意资源且引起注意偏向.个体对情绪信息的适度偏向具有重要的社会生活意义.本文介绍了情绪注意偏向的注意成分理论、图式理论、注意资源理论和平行分布处理(PDP)模型,并分别对抑制范式下以不同情绪材料展开的正常被试和特殊被试的情绪注意偏向研究进行了总结概括,同时指出了未来在抑制范式下利用ERPs、fMRI新技术研究不同被试群体情绪与注意关系的可能性.     

Body dissatisfaction,engagement in body change behaviors and sociocultural influences on body image among Chinese adolescents

Body dissatisfaction and body image disorders are becoming increasingly prevalent in developing non-Western countries such as China, but there is a lack of research examining the sociocultural factors that in other contexts have been associated with these problems. The current study investigated body dissatisfaction, engagement in body change behaviors, and sociocultural pressures on body image, and the relationships between these variables among 517 adolescent males (N = 219) and females (N = 298) in China. Females reported greater body dissatisfaction than males, and males reported using strategies to increase their muscle bulk more often than females. Males reported pressure from a variety of sociocultural sources to increase their muscles or weight, while females reported pressure from the media to lose weight. For males body dissatisfaction was predicted by pressure from peers to increase their muscle bulk, while for females pressure to lose weight from peers, adult relatives, and the media was likely to increase body dissatisfaction. Pressure from the media and adult relatives was also predictive of body change behaviors in both males and females. The findings are discussed in relation to previous research in both Western and non-Western contexts.     

差异化变革型领导对知识分享与团队创造力的影响:社会网络机制的解释

差异化变革型领导是团队领导领域的最新议题,现有的研究局限于探讨其社会心理方面的作用机制。本文从社会网络机制出发解释差异化变革型领导对团队知识分享及团队创造力的影响。基于65家企业的225个工作团队样本的结构方程模型分析表明,团队一致性变革型领导正向影响团队交流网络密度从而提高团队知识分享;个体差异性变革型领导正向影响团队成员交流网络密度差异性从而降低团队知识分享;团队知识分享正向影响团队创造力。本文的证据表明,在中国情境下,差异性团队领导行为不利于创造稠密的团队交流网络,以及团队知识分享,从而不利于提升团队创造力水平。     

The interference problem for the betting interpretation of degrees of belief

The paper’s target is the historically influential betting interpretation of subjective probabilities due to Ramsey and de Finetti. While there are several classical and well-known objections to this interpretation, the paper focuses on just one fundamental problem: There is a sense in which degrees of belief cannot be interpreted as betting rates. The reasons differ in different cases, but there’s one crucial feature that all these cases have in common: The agent’s degree of belief in a proposition A does not coincide with her degree of belief in a conditional that A would be the case if she were to bet on A, where the belief in this conditional itself is conditioned on the supposition that the agent will have an opportunity to make such a bet. Even though the two degrees of belief sometimes can coincide (they will coincide in those cases when the bet has no expected causal bearings on the proposition A and the opportunity to bet have no evidential bearings on that proposition), it is the latter belief rather than the former that guides the agent’s rational betting behaviour. The reason is that this latter belief takes into consideration potential interferences that bet opportunities and betting itself might create with regard to the proposition to be betted on. It is because of this interference problem that the agent’s degree of belief in A cannot be interpreted as her betting rate for A.     

An Evaluation of Equivalence in Body Dissatisfaction Measurement Across Cultures

We evaluated gender-based and cross-cultural equivalence of the Body Dissatisfaction Scale of the Body Change Inventory in a sample of 4,005 adolescents from 7 cultures that represent diverse body image ideals and response styles. Results of multigroup confirmatory factor analyses demonstrated equivalence of the scale across gender but not across cultures. Follow-up analyses identified small but significant cross-cultural differences in response styles (specifically, acquiescence and middle response option endorsement) as the source of this noninvariance. We recommend use of this scale for gender-based comparisons but caution that researchers should evaluate the presence of response biases before making substantive conclusions about cross-cultural differences in body dissatisfaction.