Collinear masking effect in visual search is independent of perceptual salience

Searching for a target in a salient region should be easier than looking for one in a nonsalient region. However, we previously discovered a contradictory phenomenon in which a local target in a salient structure was more difficult to find than one in the background. The salient structure was constructed of orientation singletons aligned to each other to form a collinear structure. In the present study, we undertake to determine whether such a masking effect was a result of salience competition between a global structure and the local target. In the first 3 experiments, we increased the salience value of the local target with the hope of adding to its competitive advantage and eventually eliminating the masking effect; nevertheless, the masking effect persisted. In an additional 2 experiments, we reduced salience of the global collinear structure by altering the orientation of the background bars and the masking effect still emerged. Our salience manipulations were validated by a controlled condition in which the global structure was grouped noncollinearly. In this case, local target salience increase (e.g., onset) or global distractor salience reduction (e.g., randomized flanking orientations) effectively removed the facilitation effect of the noncollinear structure. Our data suggest that salience competition is unlikely to explain the collinear masking effect, and other mechanisms such as contour integration, border formation, or the crowding effect may be prospective candidates for further investigation.     

基于信号检测论的新业务投资决策有限理性实验

采用情境模拟实验,以60名MBA/EMBA学员为被试,对新业务投资决策的4个主要因素、36个处理、12个信号检测单元进行了观察分析.研究发现:①辨别力最强的决策信息组合、判断标准最高的决策信息组合,以及辨别力和判断标准 "双低"的决策信息组合;②影响决策者的有限理性存在程度差别,强弱依次是投资情境、面对机会、投资模式和以往机会.     

胜任特征模型评价的一致性研究

本研究通过比较评价者内部和评价者之间对军事指挥院校学员胜任特征评价的一致性,探讨应用胜任特征模型进行评价时,其评价结果的一致性问题。结果表明：(1)应用胜任特征模型进行评价时,来自同一个评价源的评价者之间和来自不同评价源的评价者之间均具有较好的评价一致性;(2)同事评价者之间对胜任特征评价的一致性高于上级评价者之间评价的一致性;(3)评价者内部一致性越高,并不能改善评价者间的一致性;(4)胜任特征模型在不同的情景中应用时具有较好的稳定性。