Inhaltsangabe zu Brown: A methodological consideration of the problem of psychometrics

Ohne Zusammenfassung     

Different parameters support generalization and discrimination learning in Drosophila at the flight simulator

We have used a genetically tractable model system, the fruit fly Drosophila melanogaster to study the interdependence between sensory processing and associative processing on learning performance. We investigated the influence of variations in the physical and predictive properties of color stimuli in several different operant-conditioning procedures on the subsequent learning performance. These procedures included context and stimulus generalization as well as color, compound, and conditional discrimination (colors and patterns). A surprisingly complex dependence of the learning performance on the colors' physical and predictive properties emerged, which was clarified by taking into account the fly-subjective perception of the color stimuli. Based on estimates of the stimuli's color and brightness values, we propose that the different tasks are supported by different parameters of the color stimuli; generalization occurs only if the chromaticity is sufficiently similar, whereas discrimination learning relies on brightness differences.     

Transactive memory system links work team characteristics and performance

Teamwork and coordination of expertise among team members with different backgrounds are increasingly recognized as important for team effectiveness. Recently, researchers have examined how team members rely on transactive memory system (TMS; D. M. Wegner, 1987) to share their distributed knowledge and expertise. To establish the ecological validity and generality of TMS research findings, this study sampled 104 work teams from a variety of organizational settings in China and examined the relationships between team characteristics, TMS, and team performance. The results suggest that task interdependence, cooperative goal interdependence, and support for innovation are positively related to work teams' TMS and that TMS is related to team performance; moreover, structural equation analysis indicates that TMS mediates the team characteristics-performance links. Findings have implications both for team leaders to manage their work teams effectively and for team members to improve their team performance.     

Book review

Long-standing beliefs about one's self-efficacy and learning ability accumulate over the school years. Attributions, or causal perceptions and interpretations, of behavioural outcomes are also based on a person's learning history. And, it is evident from research on attributional bias and self-esteem that the perceived causes of success and failure have consequences for academic success. An important perspective on attributions, frequently neglected in educational research, pertains to content-specific beliefs about one's competence. We set up a field study in which students from the first form of secondary education were asked to report their causal attributions of regular school examinations in three school subjects: history, native language, and mathematics. The results suggest that students generate different causal attributions for successful or unsuccessful examinations, belonging to different school-subjects. Perception of specific examination conditions may or may not urge students to generate specific attributions. There is evidence for both school-subject specificity and examination-specificity in the observed causal attributions. But, the effect of school-subject seems to be more pronounced than the effect of examination. Information at the momentary level (examination conditions) interacts with information at the middle level (school-subject). Closer analyses of the observed causal attributions vis-à-vis perceived success and failure in the three school-subjects displayed marked differences, especially in relation to the effort attributions.     

高技术工作团队的交互记忆系统及其效果

交互记忆系统近来被认为是影响工作团队绩效的重要特性之一。以往的研究局限于实验室样本或者由学生组成的临时团队,该研究从高技术企业中选取190个工作团队作为样本,考查了团队的交互记忆系统与团队中的其它现象之间的关系。研究除了发现Lewis的量表中有两个题目不理想外,还发现交互记忆系统与团队成员之间的信任、合作性目标导向具有显著的正相关,同时交互记忆系统与团队的工作绩效和凝聚力也具有显著的关系。该文在检验团队层次的现象时,通过计算团队成员在相应变量上得分的一致性(rwg)来检查加总分析的合理性,这是从事团队层次的研究中需要遵循的方法