Why rare targets are slow: Evidence that the target probability effect has an attentional locus

Target probability has a well-known effect on detection times: Targets that occur with lower probability are detected more slowly than their higher-probability counterparts. A long-standing issue of interest is what causes this effect. In the two experiments of this study, we examined the possibility that the target probability effect has an attentional locus. We report two key findings that are consistent with this hypothesis. First, we observed a magnification of the effect when the attentional resources available for target detection were limited. Second, we also observed the complementary pattern: an attenuation of the effect when more attentional resources were available for detection. We propose that the target probability effect is caused by an asymmetry in the attentional demands made by targets that occur with different probabilities, with low-probability targets being more attentionally demanding than high-probability ones.     

论早期诊断决策的认知误区和认知节点

早期诊断决策为临床决策中难度较大的问题之一。在早期诊断的决策过程中,存在着一系列认知误区。通过对早期诊断决策认知节点的分析,建构早期诊断决策的认知系统,了解并掌握走出认知误区的思维方法。     

Proactive Personality, Employee Creativity, and Newcomer Outcomes: A Longitudinal Study

Purpose  To examine the relationship between proactive personality, employee creativity, and newcomer outcomes (i.e., career satisfaction and perceived insider status). Design/methodology/approach   A survey was conducted using a 3-wave longitudinal design with 146 Hong Kong Chinese employees from various organizations. Structural equation modeling was used to test the research hypotheses including the mediation effects. Findings   Proactive personality was positively associated with employee creativity and employee creativity was positively associated with career satisfaction and perceived insider status. In addition, employee creativity fully mediated the relationships between proactive personality and career satisfaction and perceived insider status. Implications   Based on self-reported responses, these data show that newcomers with a proactive personality shape their work environments in part through creative behavior, which in turn leads to feelings of career satisfaction and perceptions of being an organizational insider. Our study’s results also show that employee creativity is positively and significantly related to workers’ career satisfaction and perceived insider status, suggesting that employee creativity can improve employees’ attitudes toward their career and perceptions as valued and contributing organizational insiders. Future research may examine other possible variables that might mediate the relationship between proactive personality and individual outcomes. Originality/value  One of the few studies that have examined the intervening mechanism by which proactive personality leads to employee outcomes and examined the effects of proactive personality on employee outcomes in Asian culture. Received and reviewed by former editor, George Neuman.     

The trajectory of the target probability effect

The effect of target probability on detection times is well-established: Even when detection accuracy is high, lower probability targets are detected more slowly than higher probability ones. Although this target probability effect on detection times has been well-studied, one aspect of it has remained largely unexamined: How the effect develops over the span of an experiment. Here, we investigated this issue with two detection experiments that assessed different target probability ratios. Conventional block segment analysis and linear mixed-effects modeling converged on two key findings. First, we found that the magnitude of the target probability effect increases as one progresses through a block of trials. Second, we found, by examining the trajectories of the low- and high-probability targets, that this increase in effect magnitude was driven by the low-probability targets. Specifically, we found that low-probability targets were detected more slowly as a block of trials progressed. Performance to high-probability targets, on the other hand, was largely invariant across the block. The latter finding is of particular interest because it cannot be reconciled with accounts that propose that the target probability effect is driven by the high-probability targets.     

Preoccupied minds feel less control: Sense of agency is modulated by cognitive load

People have little difficulty distinguishing effects they cause and those they do not. An important question is what underlies this sense of agency. A prevailing idea is that the sense of agency arises from a comparison between a predictive representation of the effect (of a given action) and the actual effect that occurs, with a clear match between the two producing a strong sense of agency. Although there is general agreement on this comparison process, one important theoretical issue that has yet to be fully determined is whether these computations are consciously performed. Here, we studied this issue by requiring participants to perform a simple judgment of agency task under conditions of different concurrent working memory load. Working memory operations are known to tax conscious cognitive resources. We found that agency judgments were moderated by working memory load, with lower agency ratings being observed in the high load condition, suggesting that the sense of agency is dependent on the availability of conscious cognitive resources. An examination of the time-course of this load effect suggests that it is the construction of the mental representation of the predicted effect which is particularly dependent on said resources.     

Sociology and psychology within the scope of scientific dishonesty

A survey is undertaken based on qualitative analyses of the cases of scientific misconduct from the Danish Committee on Scientific Dishonesty’s first five years of collecting data, with additional information from selected international sources, in which underlying psychological motivations can be judged. An carlier version of this paper was presented at a symposium, Scientific Misconduct. An International Perspective, organised by The Medical University of Warsay, 16 November, 1998.