Indispensability and group identification as sources of task motivation

Traditional Instrumentality × Value (I × V) models have attributed gains in performance groups to various conditions affecting the instrumentality of group members’ effort for a variety of valued outcomes. Social identity models have challenged this interpretation, suggesting that the instrumentality of effort may be irrelevant when group identification is high. A laboratory study is reported in which both indispensability and group identification are manipulated, and participants’ effort on a physical persistence task is assessed. Contrary to the social identity predictions but consistent with I × V predictions, the indispensability of effort had a positive effect on participants’ effort. Group identification had no direct or moderating effects on effort.     

Measurement by subjective estimation: Testing for separable representations

Studying how individuals compare two given quantitative stimuli, say d₁ and d₂, is a fundamental problem. One very common way to address it is through ratio estimation, that is to ask individuals not to give values to d₁ and d₂, but rather to give their estimates of the ratio p=d₁/d₂. Several psychophysical theories (the best known being Stevens’ power-law) claim that this ratio cannot be known directly and that there are cognitive distortions on the apprehension of the different quantities. These theories result in the so-called separable representations [Luce, R. D. (2002). A psychophysical theory of intensity proportions, joint presentations, and matches. Psychological Review, 109, 520–532; Narens, L. (1996). A theory of ratio magnitude estimation. Journal of Mathematical Psychology, 40, 109–788], which include Stevens’ model as a special case. In this paper we propose a general statistical framework that allows for testing in a rigorous way whether the separable representation theory is grounded or not. We conclude in favor of it, but reject Stevens’ model. As a byproduct, we provide estimates of the psychophysical functions of interest.     

A fast numerical algorithm for the estimation of diffusion model parameters

In this paper, we describe a new algorithmic approach for parameter estimation in Ratcliff's [(1978). A theory of memory retrieval. Psychological Review, 85 (2), 59-108] diffusion model. This problem, especially if inter-trial variabilities of parameters are included in the model, is computationally very expensive; the parameter estimation procedure often takes a long time even with today's high-speed computers. The algorithm described here makes the calculation of the cumulative distribution functions for predicted process durations computationally much less expensive. This improvement is achieved by solving the Kolmogorov backward equation numerically instead of employing the previously used closed form solution. Additionally, the algorithm can determine the optimum fit for one of the model parameters (the starting point z) directly, thereby reducing the dimension of the parameter search space by one. The resulting method is shown to be notably faster than the standard (closed-form solution) method for parameter estimation.     

The Neural Basis of Implicit Attitudes

ABSTRACT— Evidence that human preferences, beliefs, and behavior are influenced by sources that are outside the reach of conscious awareness, control, intention, and self-reflection is incontrovertible. Recent advances in neuroscience have enabled researchers to investigate the neural basis of these implicit attitudes, particularly attitudes involving social groups. From this research, a model with three identified neural components related to the automatic activation and regulation of implicit attitudes is beginning to emerge. The amygdala is implicated in the automatic evaluation of socially relevant stimuli, while the anterior cingulate and dorsolateral prefrontal cortices are involved in the detection and regulation, respectively, of implicit attitudes. Further support for this model comes from the inclusion of these regions in current models concerning the cognitive regulation of emotion and the detection of conflict. The identification of a putative neural substrate for implicit attitudes has had a direct impact on psychological research into their nature and operational characteristics. We discuss how this emerging neural model has influenced current research on implicit attitudes and describe the importance of such models for directing future research.     

Speech Perception: Cognitive Foundations and Cortical Implementation

ABSTRACT— Speech perception includes, minimally, the set of computations that transform continuously varying acoustic signals into linguistic representations that can be used for subsequent processing. The auditory and motor subroutines of this complex perceptual process are executed in a network of brain areas organized in ventral and dorsal parallel pathways, performing sound-to-meaning and sound-to-motor mappings, respectively. Research on speech using neurobiological techniques argues against narrow motor or auditory theories. To account for the range of cognitive and neural attributes, integrative computational models seem promising.     

大学生英语学习策略使用特点及发展趋势研究

采用自编问卷对493名不同背景大学生英语学习策略的调查发现,大学生内隐学习策略显著低于外显策略,表明我国大学生英语学习以外显为主;外显策略中,社会/情感策略水平最高,而元认知策略水平最低;英语学习策略的使用在性别、英语学习难易程度的主观判断以及学业成就水平等因素上呈现出明显的差异性特点,女生的策略使用率总体高于男生,英语学习成就越高以及英语学习认知越积极的学生学习策略使用率越高;大学生英语学习策略的发展呈V型趋势,在大三低至谷底,男生的策略波动幅度显著大于女生。     

Strategy generalization across orientation tasks: testing a computational cognitive model

Humans use their spatial information processing abilities flexibly to facilitate problem solving and decision making in a variety of tasks. This article explores the question of whether a general strategy can be adapted for performing two different spatial orientation tasks by testing the predictions of a computational cognitive model. Human performance was measured on an orientation task requiring participants to identify the location of a target either on a map (find-on-map) or within an egocentric view of a space (find-in-scene). A general strategy instantiated in a computational cognitive model of the find-on-map task, based on the results from Gunzelmann and Anderson (2006) , was adapted to perform both tasks and used to generate performance predictions for a new study. The qualitative fit of the model to the human data supports the view that participants were able to tailor a general strategy to the requirements of particular spatial tasks. The quantitative differences between the predictions of the model and the performance of human participants in the new experiment expose individual differences in sample populations. The model provides a means of accounting for those differences and a framework for understanding how human spatial abilities are applied to naturalistic spatial tasks that involve reasoning with maps.     

领导干部的人格特点与工作绩效的关系：QZPS与NEO PI-R的比较

研究旨在探讨基层党政领导干部的人格特点与工作绩效之间的关系。中国人人格量表（QZPS）测量的人格的七个维度及其18个次级因素均与工作绩效的维度存在不同程度的相关,其中处世态度、人际关系和外向性与任务绩效绩效相关最高,处世态度、情绪性和行事风格与个人品质绩效绩效相关最高,而情绪性与他人评定绩效相关最高。人格因素可以解释自我评定绩效31. 7% ~ 49. 9%的变异,可以解释他人评定绩效6. 3% ~ 12. 8%的变异。而采用NEO PI-R测量人格时,所解释的工作绩效的变异只有QZPS的1/3左右。文中还讨论了工作绩效和人格结构的文化意义以及本土化研究的重要性     

Expectation confirmation: An examination of three competing models

We discuss three theoretical models from met expectations research in the fields of organizational behavior and consumer psychology. Based on the fundamental arguments in the models, we term these models: disconfirmation, ideal point, and experiences only. We present three-dimensional graphical and analytical representations of the models, with satisfaction being a function of expectations and experiences. We tested the models in the context of a new information system implementation in an organization, with expectations, experiences, and system satisfaction measured for both ease of use and usefulness, the focal constructs of the Technology Acceptance Model (TAM). We found that an experiences only model in which expectations had no measurable effect best explained the data for ease of use. The results for usefulness indicated a modified version of the experiences only model in which the positive effect of experiences becomes slightly stronger—i.e., more positive—as expectations increase.     

Perceptions of Organizational Politics: A Meta-analysis of Outcomes

Organizational researchers during the past few decades have increasingly focused on the role of subjective work issues and their impact on important worker-related outcomes. One of the most prominently studied factors, perceptions of organizational politics, has received much recent conceptual and empirical attention. In an effort to better understand the relationship between perceptions of organizational politics and key outcomes, we apply meta-analysis on 79 independent samples from 59 published and unpublished studies involving 25,059 individual participants. Results indicate strong negative relationships between POP and job satisfaction and between POP and organizational commitment, moderately positive relationships between POP and the outcomes of job stress and turnover intentions, and a non-significant relationship between POP and in-role job performance. Moderator tests show that age, work setting (i.e., public sector or private sector), and cultural differences (i.e., domestic sample or international sample), have contingent effects on certain POP relationships.