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811.
Many everyday tasks require that we use our hands co-operatively. For tasks where both hands are required to perform the same action, a common motor program can be used. But, where each hand must perform a different action, some degree of independent control of each hand is required. In this paper we examine the co-ordination of bimanual movement kinematics in a female patient recovering from brain injury involving anterior regions of the parietal lobe of the right hemisphere, which has resulted in a dense hemianaesthesia of her left arm. A particular focus of this paper is the co-ordination of bimanual movements for reaches executed without visual feedback. Specifically we present new data, which quantify the synchronisation of patient D.B.'s hands by comparing their relative time lag at the start and the end of her bimanual reaches. The results are discussed with particular reference to the role played by limb proprioception in the planning and control of prehension movements. 相似文献
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The extent to which decision-making processes are constrained in animals with small brains is poorly understood. Arthropods have brains much smaller and simpler than those of birds and mammals. This raises questions concerning limitations on how intricate the decision-making processes might be in arthropods. At Los Ba?os in the Philippines, Scytodes pallidus is a spitting spider that specialises in preying on jumping spiders, and Portia labiata is a jumping spider that preys on S. pallidus. Scytodid spit comes from the mouth, and egg-carrying females are less dangerous than eggless scytodids because the female uses her chelicerae to hold her eggs. Held eggs block her mouth, and she has to release them before she can spit. The Los Ba?os P. labiata sometimes adjusts its tactics depending on whether the scytodid encountered is carrying eggs or not. When pursuing eggless scytodids, the Los Ba?os P. labiata usually takes detour routes that enable it to close in from behind (away from the scytodid's line of fire). However, when pursuing egg-carrying scytodids, the Los Ba?os P. labiata sometimes takes faster direct routes to reach these safer prey. The Los Ba?os P. labiata apparently makes risk-related adjustments specific to whether scytodids are carrying eggs, but P. labiata from Sagada in the Philippines (allopatric to Scytodes) fails to make comparable risk-related adjustments. 相似文献
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What Is Beyond the Big Five? Plenty! 总被引:2,自引:0,他引:2
819.
Be Fair,Your Employees Are Watching: A Relational Response Model of External Third‐Party Justice
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Benjamin B. Dunford Christine L. Jackson Alan D. Boss Louis Tay R. Wayne Boss 《Personnel Psychology》2015,68(2):319-352
There is growing theoretical recognition in the organizational justice literature that an organization's treatment of external parties (such as patients, community members, customers, and the general public) shapes its own employees’ attitudes and behavior toward it. However, the emerging third‐party justice literature has an inward focus, emphasizing perceptions of the treatment of other insiders (e.g., coworkers or team members). This inward focus overlooks meaningful “outward” employee concerns relating to how organizations treat external parties. We propose a relational response model to advance the third‐party justice literature asserting that the organization's fair treatment of external parties sends important relational signals to employees that shape their social exchange perceptions toward their employer. Supporting this proposition, in two multisource studies in separate healthcare organizations we found that patient‐directed justice had indirect effects on supervisory cooperative behavior ratings through organizational trust and organizational identification. 相似文献
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Brady D. Nelson Ellen M. Kessel Felicia Jackson Greg Hajcak 《Cognitive, affective & behavioral neuroscience》2016,16(1):153-163
There is growing evidence that unpredictability and uncertainty can alter reward system functioning. The present study examined the impact of (1) a task-irrelevant unpredictable relative to predictable context and (2) individual differences in intolerance of uncertainty (IU) on the reward-related positivity (RewP), an event-related potential (ERP) response to monetary gains relative to losses. Specifically, 64 participants listened to predictable and unpredictable tone sequences while electroencephalography was recorded during a monetary gambling task. Participants also completed the Intolerance of Uncertainty Scale, which measures both cognitive distress (prospective IU) and behavioral inhibition (inhibitory IU) elicited by uncertainty, in addition to the Depression Anxiety Stress Scale-21 and Penn State Worry Questionnaire. Results indicated that the RewP was reduced during the unpredictable relative to the predictable context. Greater self-reported anxiety elicited by the unpredictable context was associated with a decreased RewP, and a decreased RewP was associated with poorer lose-shift behavioral adjustment. Furthermore, the RewP mediated the relationship between self-reported anxiety elicited by the unpredictable context and lose-shift behavioral adjustment. The IU subscales demonstrated the opposite relationship with the RewP across both contexts—inhibitory IU was associated with an attenuated RewP and prospective IU was associated with an enhanced RewP. In contrast, anxiety, depression, stress, and worry symptomatology were not associated with the RewP. This is the first study to demonstrate that an unpredictable context and individual differences in the degree to which people cannot tolerate uncertainty impact an ERP measure of reward system functioning. 相似文献