认知诊断CAT中项目曝光控制方法的比较

项目曝光率关系到题库建设和测验安全,是计算机化自适应测验(Computerized Adaptive Testing, CAT)需要考虑的重要问题。在认知诊断 CAT 情形下,首先基于传统 CAT 中 a-分层方法的思想提出按项目信息量对题库分层的分层多阶段(Stratified Multistage, SM)选题方法;然后将 SM 方法与项目合格(Item Eligibility, IE)方法相结合得到SMIE方法。在此基础上,开展模拟研究比较SM、IE、SMIE、最大修正优先指标(Maximum Modified Priority Index, MMPI)方法、限制阈值(Restrictive Threshold, RT)方法和限制进度(Restrictive Progressive, RPG)方法的选题表现。总体上,它们的测量精度从高到低依次为IE、SM、SMIE、RT、RPG和MMPI方法;项目曝光分布均匀性的优劣次序为MMPI、RPG、SMIE、RT、SM和IE方法;SMIE和RT方法能较好地平衡测量精度和项目曝光均匀性要求。     

重要他人情境对青少年意图判断诺布效应的影响*

设置了母亲、朋友、老师三类重要他人,副作用结果为积极和消极两种性质的实验故事共六个,选取311名中学生阅读故事并回答问题,以此探讨青少年诺布效应的特点及其与心理状态理解的关系。结果表明：（1）青少年在对不同重要他人的积极副作用情境进行意图判断时,表现出典型的诺布效应,但在对不同重要他人的消极副作用情境进行意图判断时,没有表现出诺布效应;（2）母亲、朋友和老师这三类重要他人对于青少年意图判断的影响没有显著差异;（3）初中生和高中生、男生和女生的意图判断没有显著差异;（4）青少年认为,由消极副作用引起的被行为者的情绪以负性情绪为主,而行为者的情绪则以正性情绪为主。本研究的结论是：青少年在进行意图判断时仅出现了不完全的诺布效应。     

对皮亚杰理论忽视社会因素作用的不同认识

皮亚杰关于社会因素对儿童认知发展的作用问题,长期受到一些心理学家的批评。针对这些批评,本文首先简要叙述了批评者批评皮亚杰忽视社会因素作用的理论依据。接着,对皮亚杰有关社会因素的主要论述进行了分析。最后,对社会因素在皮亚杰儿童认知发展理论中的作用作出了与批评者不同的评价。     

The Significance of Shendu in the Interpretation of Classical Learning and Zhu Xi’s Misreading

According to recently excavated bamboo and silk material, the idea of du 獨 in the concept shendu 慎獨 does not refer to a spatial notion of dwelling in solitude or a solitary dwelling; rather it is the state before having made contact with external things, or the state “before feelings are aroused” (weifa 未發) of the inner heart/mind. It refers to internal thoughts and volitions, or “casting aside external sensations” (sheti 舍體). Shen 慎 should be glossed in accordance with the Erya 爾雅 (Approaching Elegance), rendering it as “sincerity” (cheng 誠). Shendu then means to “cause one’s will to be sincere” (chengqiyi 誠其意). Zheng Xuan 鄭玄, in explaining shendu as being “cautious of the actions one performs in private” (shen qi xianju suowei 慎其閒居所為), completely strayed from the original meaning as found in the bamboo-silk texts. Zhu Xi 朱熹, seeing the insufficiencies of Zheng Xuan’s interpretation of shendu, broadened the meaning of du, and in particular added a spiritual meaning to it. However, due to influence by Zheng Xuan, Zhu Xi still preserved some misreadings of the term; especially in his interpretation of shendu in the Daxue 大學 (Great Learning) and Zhongyong 中庸 (Doctrine of the Mean). Considering that the Neo-Confucian methods of cultivation embodied in the ideas of “abiding in reverence and enriching the self” (jujing hanyang 居敬涵養), and “being refined and focused” (weijing weiyi 惟精惟一) actually accorded more with the original meaning of shendu, Zhu Xi’s misreading of shendu is indirectly related to the loss of its original meaning due to the broken transmission of the ancient texts.     

从环境问题的解决中看公民社会的应有结构——基于百村调查资料分析的一种推论

在环保领域里,公民社会的两类主体应当包括环境利益受到危害的社会公众与从事环境保护的民间组织(ENGO)。他们本来该作为并列的公民社会组分而存在,但在现实中,社会公众虽然可以被赋予环境保护者的角色,且他们的参与在相关政策中极其重要,但是,由于他们代表环境利益时的组织能力不以与表达环境价值时存在漏洞,因而与理想的公民社会组分有一定的偏离。社会公众的缺陷恰好能够由ENGO的特点得到补偿,作为环境价值与社会责任感的双重持有者,ENGO有潜力成为一种辅助与引导社会公众的精英性社会力量,并在二者间建立起合作型的公民社会结构。     

自然选择与肿瘤转移治疗新策略

微环境以自然选择的方式对肿瘤细胞亚群进行选择,使某些亚克隆更加倾向于向某些位置转移.微环境的自然选择是肿瘤转移的前提条件,始终贯穿于肿瘤发生发展的全过程,从自然选择的角度看肿瘤的转移,研究肿瘤转移需要的微环境,通过破坏转移前微环境,达到预防和治疗肿瘤转移的目的,将为肿瘤转移的治疗开创一条新路.     

Psychosocial Well-being of Children in HIV/AIDS-Affected Families in Southwest China: A Qualitative Study

We investigated the psychosocial well-being of children in HIV/AIDS-affected families in rural China from the child’s and caregiver’s perspectives. Semi-structured interviews were conducted among children living in HIV/AIDS-affected families (n = 16), their caregivers (n = 16) and key community informants (n = 5). Our findings showed that all of the children relied heavily on caregivers and peers to gain psychological support. Children’s psychosocial problems included fear, anxiety, grief, and loss of self-esteem and confidence. Stigma towards children existed, including isolation, ignorance and rejection. Our study illustrates that HIV/AIDS has impacted negatively on the psychosocial well-being of children. These findings can be used as preliminary data supporting more researches to profoundly explore the psychosocial impact of HIV/AIDS on children and appropriately indicate the need for interventions.     

Associations Between Sexual Orientation Discrimination and Depression Among Same-Sex Couples: Moderating Effects of Dyadic Coping

Drawing from minority stress theory and the systemic–transactional model, we examined whether perceptions of partner's dyadic coping behavior moderated the association between sexual orientation discrimination stress and symptoms of depression among individuals in a same-sex relationship. Data from 95 same-sex couples revealed that, overall, sexual orientation discrimination stress was positively associated with depressive symptoms; however, perceived partner emotion-focused supportive dyadic coping weakened this association. Specifically, higher sexual orientation discrimination stress was associated with greater depressive symptoms only for individuals perceiving low partner emotion-focused supportive dyadic coping. Implications for researchers and clinicians are presented.     

胰岛再生治疗的前景

胰岛β细胞数量减少和功能障碍是糖尿病的根本原因,现有的治疗手段主要以维持正常血糖水平为主要目的,尚无有效恢复受损胰岛功能的治愈性治疗手段.胰岛再生治疗将是一种可以恢复受损胰岛功能、改变糖尿病自然病程的崭新治疗手段.目前现有的噻唑烷二酮、肠促胰岛素及类似物、二肽基肽酶-4抑制剂等治疗,虽然不是一类新的胰岛再生药物,但其具有一定的促进胰岛再生、改善胰岛功能的作用.体外诱导β细胞再生也将为胰岛移植提供新的来源,为治愈糖尿病带来曙光.     

小学生自信心养成的实验研究

本研究对辽宁省六所小学544名儿童自信心发展水平进行调查分析,并进行儿童进行自信心养成的实验研究。结果表明：实施“自主教育系列活动”能有效地促进小学生自信心发展;儿童自信心发展水平随年龄增长呈现不均衡状况;小学高年级女生自信心发展水平高于男生;双亲家庭儿童自信心发展水平优于单亲家庭儿童;独生子女与非独生子女的自信心发展水平没有显著差异。