Psychometric properties of the Reynolds Child Depression Scale in community and clinical samples

The factor structure of the Reynolds Child Depression Scale (RCDS; Reynolds, 1989), analyzed by confirmatory factor analysis and the scale's psychometric characteristics in a sample of 315 participants (140 boys and 175 girls) and a clinical sample of 62 participants (37 boys and 25 girls) between 10 and 12 years old, are presented. Two models are tested with confirmatory factor analysis: a one-factor model and a five-factor model. Both models show a good fit, but the one-factor model was chosen because it is the most parsimonious. The reliability coefficient ranged from .87 (at test) to .89 (at retest) in the community sample, and was .90 in the clinical sample (at test). Test-retest reliability was .66 in the community sample. Concurrent validity with other self-reports that measure depressive symptomatology was high, both in the community sample (.76) and the clinical sample (.71). There were no significant sex differences but there were differences due to age (school grade).     

Rotating item banks versus restriction of maximum exposure rates in computerized adaptive testing

If examinees were to know, beforehand, part of the content of a computerized adaptive test, their estimated trait levels would then have a marked positive bias. One of the strategies to avoid this consists of dividing a large item bank into several sub-banks and rotating the sub-bank employed (Ariel, Veldkamp & van der Linden, 2004). This strategy permits substantial improvements in exposure control at little cost to measurement accuracy, However, we do not know whether this option provides better results than using the master bank with greater restriction in the maximum exposure rates (Sympson & Hetter, 1985). In order to investigate this issue, we worked with several simulated banks of 2100 items, comparing them, for RMSE and overlap rate, with the same banks divided in two, three... up to seven sub-banks. By means of extensive manipulation of the maximum exposure rate in each bank, we found that the option of rotating banks slightly outperformed the option of restricting maximum exposure rate of the master bank by means of the Sympson-Hetter method.     

行为治疗与行为心理学

行为主义心理学的发展可以分成两个时期。以20世纪五六十年代之交为分界线,此前为理论准备时期,此后为形成和发展期。行为治疗的基本理论主要包括3个部分：经典的条件反射原理、操作条件作用原理和模仿学习的原理。行为治疗中的常用技术有系统脱敏法、满灌疗法、厌恶疗法和强化的方法等。行为疗法以短、平、快见长,已成为我国心理治疗的主要方法之一,为心理学的发展奠定了坚实的基础。     

在亚健康状态研究中运用结构方程模型的合理性

亚健康状态是处于健康与疾病之间的一种“非病但非健康”的中间状态,主要表现为躯体、心理和社会适应等方面的不适,目前尚没有公认的概念和测量诊断工具。由于亚健康状态研究数据中含有潜变量、测量误差以及变量间关系需要确定等因素,不能使用传统的统计学方法进行处理。结构方程模型能够同时处理观测变量、潜变量、测量误差及变量间的关系,应用结构方程模型验证亚健康状况测量量表的结构效度和亚健康状态理论模型是非常合理的。     

特质标签对儿童错误信念理解的影响

该研究将错误信念任务中主人公加上"聪明"或"笨"的标签,以考察特质标签是否会影响儿童对错误信念的理解。360名5~8岁儿童参加实验,每个年龄组儿童随机分配到"聪明"标签组、无标签组和"笨"标签组。结果表明:(1)"聪明"标签会极大地阻碍67、岁儿童理解他人错误信念,对5、8岁儿童没有影响;(2)"笨"标签对所有年龄组儿童错误信念的理解都没有产生影响。     

文化背景与医疗行为:一个少数民族社区中的新型农村合作医疗

现有对民族社区新型农作合作医疗（以下简称新农合）的研究相对较少,同时在研究中忽略了在其独特民族文化背景下对于疾病与医疗的不同认知,这一认知影响了人们的医疗观念和医疗行为,也直接影响了人们对新农合的态度和行为。医学人类学关注文化与疾病、医疗的关系,以云南省福贡县赤恒底傈僳族社区新农合的田野调查为例,应用医学人类学的视角和社区研究方法对其进行研究,以期获得新的认识和理解。     

移植排斥反应中若干问题的思考

随着器官移植术和免疫抑制药物的发展,器官移植已成为挽救各类终末期器官功能衰竭患者的最有效手段。然而,移植排斥反应依然是困扰移植学界的难题。移植排斥反应的发生机制和治疗过程中体现了矛盾的普遍性和特殊性,用辩证思考的方法可以有效地指导移植排斥反应机制研究和临床治疗。     

Inferences from semifactual 'even if' conditionals

We report three experiments on semifactual conditionals such as 'even if he had worn his seatbelt he would have been injured'. Semifactuals contain a counterfactual antecedent (the presupposed fact is, he did not wear a seatbelt) and a true consequent (the fact is, he was injured). The experiments show that from the denial of the antecedent, 'he did not wear his seatbelt', reasoners do not infer the standard conclusion 'he was not injured' but instead they infer the asymmetric conclusion, 'he was injured'. From the affirmation of the consequent, 'he was injured', they do not infer the standard conclusion 'he wore his seatbelt' but instead they infer that there is no valid conclusion. The first experiment shows this pattern for 'even if' subjunctive conditionals compared to 'if' indicative conditionals, the second extends it to 'even if' subjunctive conditionals compared to 'even though' indicative concessives, and the third extends it to 'if...also/still' subjunctive conditionals. The results suggest that people think about two possibilities to understand a semifactual: the conjecture, he wore his seatbelt and he was injured, and the presupposed facts, he did not wear his seatbelt and he was injured.     

Effects of different practice conditions on acquisition, retention, and transfer of soccer skills by 9-year-old schoolchildren

This study was designed to examine effects of three practice models, blocked, variable, and combined, on the acquisition, retention, and transfer of new motor skills. 67 subjects (M age = 9.5 yr., SD = .3) from the fourth year of primary school (31 boys and 26 girls) were assigned at random to three different practice groups (Blocked = 22, Variable = 23, Combined = 22) to study acquisition of two skills, dribbling a soccer ball and kicking a soccer ball at a stationary target using the dominant foot. All participants received a pretest and posttest, a transfer test, and a retention test 2 wk. later. Analysis showed significant improvement after practice of kicking skills by the three groups but not in the dribbling skills, for which only the combined practice group showed any notable improvement. At the end of acquisition, the combined practice group had significantly better performance on the dribbling task than the other two groups. However, the only differences noted in performance of kicking the ball with the dominant foot were by combined practice and blocked groups.