小学生数学应用题解决的认知机制研究

研究的目的是探讨影响小学生应用题解决的认知因素及其作用机制。采用自编的应用题解决问卷对183名小学生进行了测量和统计分析。结果表明：情境理解、问题表征、问题归类、解题计划和自我评价是影响小学生应用题解决的主要认知因素。其中,情境理解首先影响问题表征、问题归类、解题计划和自我评价,后四个因素又进一步影响解题成绩。     

儿童社会适应的社会信息加工模型及其特殊应用

亲社会儿童具有独特的社会信息加工特点:友善的归因倾向,关系性目标定向,对亲社会行为反应做积极评价等。应用SIP范式对儿童亲社会行为进行研究,不仅有助于研究者更清楚地揭示社会认知与亲社会行为之间的关系,理解儿童社会性发展的机制,而且还对儿童的行为矫正和训练具有积极意义。但是,SIP模型应用于亲社会行为研究时在理论模型及方法工具上还存在一定的局限。     

弱智儿童视觉-动作控制的实验研究

该研究探讨了弱智儿童视觉-动作控制能力。弱智儿童被试30人,平均年龄13.5岁,平均智商53.9。实验结果与正常人的结果作了比较。结果显示,弱智儿童的视觉-动作控制能力只相当五六岁正常儿童的水平,远落后于正常中青年及老年的水平。这表明,智力缺陷与发展水平对人的视觉-动作控制能力有明显影响。     

DNA双螺旋结构模型与生物医学的发展

DNA双螺旋模型的建立大大推进了生物医学的研究,基因工程技术的诞生和临床医学的发展,已经成为生命科学发展史中的一个里程碑,     

生命史权衡的内在机制:动机控制策略的中介作用

本研究基于生命史理论框架,通过整合生命史理论以及毕生发展动机理论的研究,进一步探索并验证生命史权衡的内在机制:动机控制策略(而非控制感)的中介效应。研究1采取问卷调查的方法,选取Mini-K量表以及首要–次级控制优化量表,结果表明,最优化策略、选择性首要控制以及选择性次级控制均发挥中介作用。研究2采用实验法,针对性地验证暴露在负性环境线索中的个体的最优化策略是否起中介作用,结果表明,最优化策略中介童年社会经济地位和延迟满足的关系。     

信任氛围、内部人身份认知与员工角色内绩效:中介的调节效应

虽然已有研究从逻辑上推理内部人身份认知在信任氛围与角色内绩效之间起中介作用,但却极少给出实证的结果。本研究基于角色认同理论和自我认知理论,以31家生产型企业的330员工为调查对象,从心理安全感的视角对信任氛围是否以及如何通过内部人身份认知影响角色内绩效进行了实证研究。结果显示:1)信任氛围对员工角色内绩效具有正向影响;2)内部人身份认知部分中介信任氛围对员工角色内绩效的影响;3)心理安全感在信任氛围与内部人身份认知的关系中起调节作用;进一步,4)心理安全感调节了内部人身份认知对信任氛围-角色内绩效中介作用。研究证明了被中介的调节效应模型全新地解释了信任氛围对角色内绩效的作用机理,对员工创新绩效管理实践提供有益的启示。     

Treating the Child or Syndrome: Does Context Matter for Treatment Decisions for Antisocially Behaving Youth?

Using a between-subject 3 × 3 design of an experimentally manipulated realistic case vignette of Black, White, and Hispanic youth in a survey mailed to 1540 experienced psychologists, psychiatrists, and social workers, the authors examined if clinicians alter their judgments about treatment for antisocially behaving youth based on the symptom’s social context (e.g., life circumstances) and the youth’s race or ethnicity, even among youth who are otherwise identical in terms of behavioral symptoms. Vignettes describe behaviors meeting DSM-IV criteria for conduct disorder, but contain contextual information suggesting either internal dysfunction (ID) or a normal response to a difficult environment [i.e., environmental-reaction (ER)]. Comparison was symptom-only (SO). Judgments of effectiveness of 14 treatments for youth exhibiting antisocial behavior were examined. Frequencies and median scores of perceived effectiveness level (1–9, Likert) were compared in bivariate analyses, stratifying context and youth’s race or ethnicity. The context of the behavior was associated significantly with differences in effectiveness judgments in 13 of 14 treatments. Within ID and ER contexts, clinicians judged three different treatments as effective (median ≥ 7 of 9). In the SO condition, clinicians were less selective, judging six as effective. In the ID context, psychiatric medications, systems oriented family therapy, and residential care were judged more effective for White than for Black or Hispanic youth. Evidence-based practice research may be hampered by inattention to the social context of behavioral symptoms. Context may activate implicit racial assumptions about treatment effectiveness. Implications are for clinical training to improve service delivery, and future clinical research.     

Effect of 45‐Day −6° Head‐Down Bed Rest on Cooperation and Aggression

High levels of cooperation and low aggression seem obviously vital to the successful implementation of space missions. To elucidate the effect of microgravity on these behaviors, we investigated whether cooperative and aggressive behaviors would be affected in 16 male volunteers during 45‐day ?6° head‐down bed rest, which is a reliable simulation model for most physiological effects of spaceflight. We used an ultimatum game task to evaluate the cooperative behavior and a revised competitive reaction time test to evaluate the aggressive behavior simultaneously. We found that (1) the participants became less cooperative in the post‐bed rest phase in comparison with the pre‐bed rest phase and (2) the participants became more aggressive in the in‐bed rest phase in comparison with the pre‐bed rest phase. These findings provide evidence that head‐down bed rest may affect both cooperative and aggressive behaviors in males, suggesting an important perspective for future studies in space psychology.Copyright © 2017 John Wiley & Sons, Ltd.     

Effect of Al-Zr clusters on the thermal stability of Cu-Zr-rich Cu-Zr-Al bulk metallic glasses

The Gibbs free energy of formation, ?G^a, of the amorphous phase of Cu–Zr-rich Cu–Zr–Al bulk metallic glasses (BMGs) has been calculated over a broad composition region to re-evaluate their thermal stability, based on the efficient cluster packing model. It is found that Al–Zr clusters have an important effect on the thermal stability of the Cu–Zr–Al BMGs with the same Cu/Zr content ratio. The crystallisation of the BMGs involves crystallisation of both Al–Zr and Cu–Zr clusters. The results could be useful for predicting the thermal stability and understanding the underlying mechanism of crystallisation of multicomponent metallic glasses.