认知诊断计算机化自适应测验中新的选题策略:结合项目区分度指标

当前国内外大部分认知诊断计算机化自适应测验(CD-CAT)主要采用PWKL作为选题策略进行研究。PWKL结合后验分布信息对KL指标进行加权,提高了判准率,但该方法仅利用个体层面信息加权,忽视了项目本身能够提供的信息,属于单源指标。本研究结合认知诊断中的项目区分度信息,对PWKL进行修正,提出了4种新的多源选题策略:GIDPWKL、AIDPWKL、CIDPWKL和KLEDPWKL方法,并在加入曝光控制下与PWKL和互信息法(MIM)进行比较。模拟研究结果表明:(1)在定长测验情景下的绝大多数实验结果表明,测验长度越短,新方法的判准率越高。平均属性/模式判准率最高的是GIDPWKL,之后是AIDPWKL,而CIDPWKL、KLEDPWKL和MIM方法的优势随实验条件不同而不同。(2)在定长测验情景下的绝大多数实验结果表明,题目质量越高,新方法的优势越明显。(3)Q矩阵结构的复杂性会影响不同选题策略的表现。(4)在变长测验情景下,4种新方法和MIM的平均测验长度均要低于PWKL方法,表现最好的是GIDPWKL方法。因此,若实际测验情景与本研究的模拟情景相似,推荐GIDPWKL方法。     

任务呈现方式、双任务反应顺序影响算术估算策略选择与执行

采用选择/无选范式,通过操纵任务呈现方式(估算题目的数字消失与否)与主次任务反应顺序(先反应算术任务或先反应字母任务),考察了双任务协调在算术策略选择与执行中的潜在作用。结果显示:(1)不同双任务呈现情境中个体的算术策略表现有明显区别。算术题目数字不消失相比消失时,个体对主、次任务的回答正确率都比较低,在策略选择上更倾向于选择较简单策略,在策略执行上准确性偏低;(2)双任务反应顺序会影响算术策略运用表现。先反应算术任务时,双任务情境只影响策略执行的准确性;而先反应字母任务时,双任务情境对策略执行的准确性和反应速度均发挥干扰作用,且估算题目的数字消失与否对策略选择准确性的影响更大,策略选择适应性之间的差异亦更加明显。上述发现对于深入理解双任务协调功能在策略运用中的作用机制具有重要意义。     

Better control with less effort: The advantage of using focused-breathing strategy over focused-distraction strategy on thought suppression

It has been suggested that unwanted thoughts usually intrude during mind wandering due to a shortage of mental resources. However, strategies for suppressing such thoughts have never been examined from a mind wandering perspective. Here, we compare the effectiveness of two types of attention distraction strategies that either redirect users’ attention to their own breathing (focused-breathing strategy, FBS) or to a mental image (focused-distraction strategy, FDS) as related to working memory capacities. Eighty-two undergraduates were randomly assigned into a FBS or FDS group. They completed a concentration task and a thought suppression task, in which mind wandering and thought intrusions were each measured. Our results support the hypothesis that mind wandering is positively correlated to thought intrusions and shows that FBS is more effective than FDS in reducing mind wandering and thought intrusions. Moreover, in contrast to FDS, the effect of FBS is independent of users’ mental resources.     

Three-dimensional model of performance anxiety: Tests of the adaptive potential of the regulatory dimension of anxiety

ObjectivesTo predict the complex anxiety-performance dynamics, Cheng and associates (Cheng, Hardy, & Markland, 2009, 2011; Cheng, Hardy, & Woodman, 2011) proposed a three-dimensional model of anxiety that highlighted the adaptive potential of anxiety, and was supported with regard to cross-cultural factorial validity and predictive validity in the context of sports performance. In particular, this anxiety model included a regulatory dimension (reflected by perceived control) in addition to the conventional intensity-oriented dimensions of cognitive and physiological anxiety.DesignTo further examine the characteristics of the hypothesized adaptive potential of the regulatory dimension of anxiety, a series of three studies were conducted to investigate the relationship mainly between the regulatory dimension and three psychological variables proposed to be related to performance and stress, namely, perfectionism, self-talk and coping strategy.MethodChinese sports participants and dancers completed self-report measures. Hierarchical multiple regression was adopted for data analysis.ResultsThe findings showed that the regulatory dimension of anxiety was positively predicted by relatively adaptive dimensions of perfectionism (personal standards) and self-talk (motivational and instructional self-talk), and positively predicted approach coping.ConclusionsOverall, these data support the hypothesized characteristics of the adaptive potential underlying the regulatory dimension of anxiety. Future research and applied implications are suggested.     

Instruction-driven processing in human perceptual learning

We conducted a series of experiments to determine the relative contribution of unsupervised versus controlled mechanisms to the intermixed-blocked effect. In Experiment 1, participants received pre-exposure instructions prompting a search for differences between stimuli, in keeping with past studies, and the intermixed-blocked effect was observed. In the remaining experiments, participants did not receive the aforementioned instructions, but instead were instructed either to simply observe the stimuli (Experiment 2) or in relation to a masking task (Experiment 3). None of the latter experiments produced an intermixed-blocked effect, suggesting that the effect found in Experiment 1 was driven by the instructions to search for differences, consistent with a controlled processing account of the effect. Moreover, we tested a prediction assuming the operation of a search strategy against one assuming the operation of a short-term habituation mechanism and found evidence more consistent with the search strategy hypothesis. We formulate a new account of the intermixed-blocked effect in humans based on an instruction-driven search and discuss how the account could explain many findings in the human literature.     

动机因素、学习策略、智力水平对学生学业成就的影响

以１１９名高中学生为被试,测量研究了动机因素、学习策略、智力水平对学生学业成就的影响。结果表明,自我效能、内在动机、掌握目标、学习策略、智商分数与学业成就呈显著的正相关,外在动机、业绩目标与学业成就呈显著的负相关。智商分数、学习策略、动机因素与学业成就存在着因果关系,智商分数（β＝０.４７６）、学习策略（β=０．２２０）、自我效能（β＝０.２０７）、掌握目标（β＝０．１８５）对学业成就有显著的回归效应,并直接影响学业成就。而内在动机（β＝０．１８４）通过直接影响学习策略而间接影响学业成就。     

心理因素对高中生学业成就的影响

采用问卷法和量表法考察了原有知识、学习策略、智力与非智力因素等心理因素对高中生学业成就的影响程度及其作用机制。结论如下:(l)高中生的主要心理因素与学业成就之间均呈显著的正相关;(2)原有知识、学习策略和非智力因素是导致高中生学业成就出现差异的直接影响因素。原有知识的影响程度明显高于学习策略和非智力因素;(3)智力通过原有知识对学业成就发挥重要的间接影响;(4)非智力因素还通过原有知识对学业成就有显著的间接影响。     

效能信念、加工方式和困难应对策略——关于自我调节学习的特点及各成分间关系的探讨

自我调节学习是一个复杂的系统,效能信念、加工方式、应对策略分别反映着自我调节学习的动机、认知、行为侧面。本研究通过对效能信念、加工方式、应对策略三者进行相关分析,探讨了自我调节学习各成分之间的关系;同时,对于自我调节学习各成分与学业成绩之间的关系亦作了探讨。在这两部分研究结论的基础上,提出了自我调节学习的理想模式,并对被试群体自我调节学习的现有状况与这一理想模式进行了对照。     

Covenants and reputations

In their classic analyses, Hobbes and Hume argue that offensively violating a covenant is irrational because the offense ruins one’s reputation. This paper explores conditions under which reputation alone can enforce covenants. The members of a community are modeled as interacting in a Covenant Game repeated over time. Folk theorems are presented that give conditions under which the Humean strategy of performing in covenants only with those who have never offensively violated or performed with an offensive violator characterizes an equilibrium of the repeated Covenant Game. These folk theorems establish that for certain ideal settings Hobbes’ and Hume’s arguments against offensively violating covenants are compelling. However, these ideal settings presuppose that the community has certain mechanisms that generate common knowledge of the identities of those with whom one should perform. I analyze the results of computer simulations of the interactions in a community whose members must rely upon private communication alone. The computer simulation data show that in this community, reputation effects cannot effectively deter members from offensively violating covenants. I conclude that Hobbes’ and Hume’s warnings against offensive violation are compelling only on condition that the community is sufficiently structured to generate common knowledge among its members. I also conclude that even in such structured communities, the Humean strategy is not the uniquely “correct” policy.     

Personality,reciprocity, and strength of conflict resolution strategy

The present field study investigates how an individual’s interpersonal conflict resolution behavior is affected by the individual’s personality (assessed by the Big 5) and a situational factor (the other party’s conflict behavior), as well as how the two factors interact. A hierarchical regression analysis based on 256 student–roommate/friend dyads shows that both factors are important. Extraversion and Agreeableness were significantly related to most conflict strategies used by students. The results show that interactions between the parties in conflict situations are strongly governed by the norm of reciprocity. Finally, we found some empirical support for the interaction effect between personality and situation, suggesting that an individual’s conflict behavior is more complex than what the dispositional or the situational view may suggest.