Reaching while calculating: scheduling of cognitive and perceptual-motor processes

To address the neglected question of how cognitive and perceptual-motor processes are coordinated, the authors asked participants to move a cursor from one target to another to reveal operators and operands for a running arithmetic task. In Experiment I performance on this task was compared with performance on tasks requiring only aiming or only arithmetic. Aiming was faster in the aiming-only task than in the combined task. More importantly, times for steps requiring calculation were equivalent in the combined and arithmetic-only tasks. The results from this and a second experiment suggest that participants slowed their aiming to allow calculations to be completed before subsequent targets were entered. As a whole, the results suggest that cognitive and perceptual-motor processes are coordinated through scheduling.     

Concurrent learning of temporal and spatial sequences

In a serial reaction time task, stimulus events simultaneously defined spatial and temporal sequences. Responses were based on the spatial dimension. The temporal sequence was incidental to the task, defined by the response-to-stimulus intervals in Experiment 1 and stimulus onset asynchronies in Experiment 2. The two sequences were either of equal length and correlated or of unequal length. In both experiments, spatial learning occurred regardless of sequence length condition. In contrast, temporal learning occurred only in the correlated condition. These results suggest that timing is an integrated part of action representations and that incidental learning for a temporal pattern does not occur independently from the action. Interestingly, sequence learning was enhanced in the correlated condition, reflecting the integration of spatial-temporal information.     

Why people harm the organization and its members: Relationships among personality,organizational commitment,and workplace deviance

Based on the five-factor model of personality traits and social exchange theory, this study examines the relationships of personality traits, organizational commitment, and two target-based factors of workplace deviance (organizational deviance and interpersonal deviance), using a sample of 113 South Korean employees. By the use of path-analysis, we first found that Agreeableness, Conscientiousness, and Emotional Stability were meaningfully related to organizational commitment. In addition, both the effect of Conscientiousness on organizational deviance and the effect of Agreeableness on interpersonal deviance were partially mediated by organizational commitment. In sum, results clearly show that the personality traits of Conscientiousness (impersonal) and Agreeableness (interpersonal) function differently in predicting workplace deviance.     

The dynamics of the visual system in combining conflicting KDE and binocular stereopsis cues

The dynamics of the visual system in combining multiple depth cues were investigated by measuring the temporal change in the perceived 3-D shape of a random-dot stimulus with conflicting kinetic depth effect (KDE) and binocular stereopsis cues. The KDE shape perception dominated for the first few seconds, and then was gradually supplanted by the stereo shape perception. The effects of various pre-adaptation stimuli suggested that the temporal change in the perceived shape resulted from a self-adaptation of the KDE mechanism that occurs mainly at the levels of motion and relative motion detection.     

Similarity-scaling studies of dot-pattern classification and recognition.

Classification performance in the dot-pattern, prototype-distortion paradigm (e.g., Posner & Keele, 1968) was modeled within a multidimensional scaling (MDS) framework. MDS solutions were derived for sets of dot patterns that were generated from prototypes. These MDS solutions were then used in conjunction with exemplar, prototype, and combined models to predict classification and recognition performance. Across 3 experiments, an MDS-based exemplar model accounted for the effects of several fundamental learning variables, including level of distortion of the patterns, category size, delay of transfer phase, and item frequency. Most important, the model quantitatively predicted classification probabilities for individual dot patterns in the sets, not simply general trends of performance. There was little evidence for the existence of a prototype-abstraction process that operated above and beyond pure exemplar-based generalization.     

Enhanced Hippocampal CA1 LTP but Normal Spatial Learning in Inositol 1,4,5-trisphosphate 3-kinase(A)-Deficient Mice

To define the physiological role of IP₃3-kinase(A) in vivo, we have generated a mouse strain with a null mutation of the IP₃3-kinase(A) locus by gene targeting. Homozygous mutant mice were fully viable, fertile, apparently normal, and did not show any morphological anomaly in brain sections. In the mutant brain, the IP₄ level was significantly decreased whereas the IP₃ level did not change, demonstrating a major role of IP₃3-kinase(A) in the generation of IP₄. Nevertheless, no significant difference was detected in the hippocampal neuronal cells of the wild-type and the mutant mice in the kinetics of Ca²⁺ regulation after glutamate stimulation. Electrophysiological analyses carried out in hippocampal slices showed that the mutation significantly enhanced the LTP in the hippocampal CA1 region, but had no effect on the LTP in dentate gyrus (DG). No difference was noted, however, between the mutant and the wild-type mice in the Morris water maze task. Our results indicate that IP₃3-kinase(A) may play an important role in the regulation of LTP in hippocampal CA1 region through the generation of IP₄, but the enhanced LTP in the hippocampal CA1 does not affect spatial learning and memory.     

When do job-insecure employees keep performing well? The buffering roles of help and prosocial motivation in the relationship between job insecurity,work engagement,and job performance

Journal of Business and Psychology - Drawing on the job demands-resources model, this study aims to explore the boundary conditions that buffer the negative effect of job insecurity on work...     

The impact of Parkinson's disease on sequence learning: perceptual pattern learning and executive function

The current study examined the contribution of brain areas affected by Parkinson's disease (PD) to sequence learning, with a specific focus on response-related processes, spatial attentional control, and executive functioning. Patients with mild PD, patients with moderate PD, and healthy age-matched participants performed three tasks-a sequence learning task with a spatial pattern that was incidental to response selection, a spatial cuing task, and neuropsychological tests of executive function. Whereas moderate PD patients failed to show significant sequence learning, mild PD patients performed comparably with controls. Neither group of PD patients was impaired in the control of spatial attention. Sequence learning was correlated with neuropsychological measures of executive function but not with the ability to control spatial attention. These results suggest that the contribution of the brain areas affected by PD to sequence learning extends beyond motor learning to include the learning of perceptual patterns and involves executive function, including cognitive flexibility and set shifting.     

What makes a group of good citizens? The role of perceived group‐level fit and critical psychological states in organizational teams

Recent studies have expanded the construct of organizational citizenship behaviour (OCB) to the group level and demonstrated its significance in predicting group performance. In this study, we have further expanded this growing stream of research regarding group‐level OCB (GOCB), by identifying distinct group characteristics that predict GOCB. Specifically, we have isolated perceived group–organization (G–O) fit and group–task (G–T) fit as meaningful antecedents of GOCB. We further propose that the perceived G–O and G–T fit influence GOCB by shaping two intermediate psychological states of group members: cohesion and group efficacy. Our findings, which were based on multi‐source data collected from 43 organizational teams, demonstrated that cohesion completely mediated the effect of perceived G–O fit on GOCB. Group efficacy, however, proved not to be a significant mediator of the relationship between perceived G–T fit and GOCB. Instead, G–T fit had a significant direct effect on GOCB. This study highlights the significance of group‐level conceptualization of group–environment interaction as a potential driver of various group processes and outcomes.     

The influence of self‐efficacy,subjective norms,and risk perception on behavioral intentions related to the H1N1 flu pandemic: A comparison between Korea and the US

This study examined the extent to which individualism‐collectivism moderates the relative effects of agency control beliefs (i.e., self‐efficacy), social norms (i.e., subjective norms), and risk perception (perceived vulnerability and perceived severity) on behavioral intention to engage in self‐protection behavior in the context of the H1N1 flu pandemic. Using multistage stratified sampling, the present study sampled people from the US (n = 399) and Korea (n = 500), two countries that have been found to be prototypical of individualistic and collectivistic national cultures, respectively. Consistent with the contrast between individualism and collectivism, the results of moderated regression analyses showed that intrapersonal control beliefs (i.e., self‐efficacy) and risk perception (i.e., perceived severity) had stronger effects on behavioral intention in the American sample than in the Korean sample, whereas social norms (i.e., subjective norms) had a stronger predictive power for the Korean sample than for the American sample. Overall, the findings contribute to health and risk studies by specifying which aspects of risk perceptions or beliefs are affected by national culture and how this translates into cross‐national variations in health risk behavioral intention.