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131.
132.
《Quarterly journal of experimental psychology (2006)》2013,66(1):79-100
Three experiments are reported, which have investigated the nature of the cognitive mechanisms that underlie performance on specific visuo-spatial working memory tasks, with the emphasis on exploring the extent of central executive involvement. Experiments 1 and 2 employed oral random digit generation as an executive task within a dual-task paradigm. The results of both experiments indicated that visuo-spatial tasks that involve sequential processing of information show more interference with random digit generation than do visuo-spatial tasks that involve simultaneous processing. The third experiment substituted oral random digit generation for executive tasks that did not involve memory for serial order (vigilance tasks adapted from Vandierendonck, De Vooght, & Van der Goten, 1998b). The results indicated significant interference between the vigilance tasks and the sequential visuo-spatial task, but not with the simultaneous visuo-spatial task. Overall the results of the three experiments are interpreted as indicating that serial sequential visuo-spatial tasks involve executive resources to a significantly greater extent than do simultaneous visuo-spatial tasks, and that this can have implications for studies that attempt to make use of such tasks to fractionate separable visual and spatial components within working memory. 相似文献
133.
《Quarterly journal of experimental psychology (2006)》2013,66(7):1397-1413
Two experiments examined how interruptions impact reading and how interruption lags and the reader's spatial memory affect the recovery from such interruptions. Participants read paragraphs of text and were interrupted unpredictably by a spoken news story while their eye movements were monitored. Time made available for consolidation prior to responding to the interruption did not aid reading resumption. However, providing readers with a visual cue that indicated the interruption location did aid task resumption substantially in Experiment 2. Taken together, the findings show that the recovery from interruptions during reading draws on spatial memory resources and can be aided by processes that support spatial memory. Practical implications are discussed. 相似文献
134.
135.
《Sport, Ethics and Philosophy》2013,7(3):254-268
The voluntary suspension of play (VSP) is a putative fair play norm that has emerged in the last 20 years in association football, though there is no reason in principle why it is limited to that sport. It occurs in football when an injury appears to have been sustained and another player deliberately puts the ball out of play so that the injury can receive rapid attention. It is widely understood as a positive development within the sport and philosophers have added their support on the basis that VSP is a way of players exercising autonomous moral responsibility. It is represented as a case of athletes putting care for their competitors before care for the contest. In this paper, however, it is argued that moral praise for VSP is misplaced. Attempts to induce a VSP almost always occur when a team is seeking to hold a position within a game. As a delaying tactic, it encourages the faking of injuries, which is all the more reprehensible because it exploits someone else's concern for that apparent injury. Conditions for the possibility of VSP within a sport are analysed as well as conditions for the abuse of VSP. VSP occurs because of a loophole, and ways in which this can be closed are presented. In an appendix, some initial empirical evidence is presented that backs the evaluative claims of the paper. 相似文献
136.
《Sport, Ethics and Philosophy》2013,7(3):337-352
Bodily movement has become an interesting topic in recent philosophy, both in analytic and phenomenological versions. Philosophy from Descartes to Kant defined the human being as a mental subject in a material body. This mechanistic attitude toward the body still lingers on in many studies of motor learning and control. The article shows how alternative philosophical views can give a better understanding of bodily movement. The article starts with Heidegger's contribution to overcoming the subject-object dichotomy and his new understanding of the primacy of the practical involvement with the surrounding world. Heidegger, however, in many ways neglected the role of the human body. Merleau-Ponty took a huge step forward when he focused on the bodily intentionality of our interaction with the world. The next step was taken by Samuel Todes who presented a better understanding of how we are bodily oriented in space. After having seen how the body is oriented outward towards the environment it is proper that the final part of this article goes inward toward the role of bodily awareness and the role of proprioception in human movement. The goal of the presentation is to contribute to a better understanding of what goes on in sport. The article therefore uses examples from sport, especially football, to show the relevance of the new insights for sport studies. 相似文献
137.
《Quarterly journal of experimental psychology (2006)》2013,66(10):1965-1980
The origins of the ability to produce action at will at the hundreds of millisecond to second range remain poorly understood. A central issue is whether such timing is governed by one mechanism or by several different mechanisms, possibly invoked by different effectors used to perform the timing task. If two effectors invoke similar timing mechanisms, then they should both produce similar variability increase with interval duration (interonset interval) and thus adhere to Weber's law (increasing linearly with the duration of the interval to be timed). Additionally, if both effectors invoke the same timing mechanism, the variability of the effectors should be highly correlated across participants. To test these possibilities, we assessed the behavioural characteristics across fingers and eyes as effectors and compared the timing variability between and within them as a function of the interval to be produced (interresponse interval). Sixty participants produced isochronous intervals from 524 to 1431?ms with their fingers and their eyes. High correlations within each effector indicated consistent performance within participants. Consistent with a single mechanism, temporal variability in both fingers and eyes followed Weber's law, and significant correlations between eye and finger variability were found for several intervals. These results can support neither the single clock nor the multiple clock hypotheses but instead suggest a partially overlapping distributed timing system. 相似文献
138.
We studied the choice behavior of 2 monkeys in a discrete-trial task with reinforcement contingencies similar to those Herrnstein (1961) used when he described the matching law. In each session, the monkeys experienced blocks of discrete trials at different relative-reinforcer frequencies or magnitudes with unsignalled transitions between the blocks. Steady-state data following adjustment to each transition were well characterized by the generalized matching law; response ratios undermatched reinforcer frequency ratios but matched reinforcer magnitude ratios. We modelled response-by-response behavior with linear models that used past reinforcers as well as past choices to predict the monkeys' choices on each trial. We found that more recently obtained reinforcers more strongly influenced choice behavior. Perhaps surprisingly, we also found that the monkeys' actions were influenced by the pattern of their own past choices. It was necessary to incorporate both past reinforcers and past choices in order to accurately capture steady-state behavior as well as the fluctuations during block transitions and the response-by-response patterns of behavior. Our results suggest that simple reinforcement learning models must account for the effects of past choices to accurately characterize behavior in this task, and that models with these properties provide a conceptual tool for studying how both past reinforcers and past choices are integrated by the neural systems that generate behavior. 相似文献
139.
This study explored different gradations of emulation in the imitation of actions on objects by 17-month-olds. Experiment 1 established levels of behavioral reproduction following prerecorded video demonstrations similar to those levels following live demonstrations. In Experiment 2, two digitally modified videos, where object movements or body movements critical to producing the target action were highlighted in isolation, were developed. Infants produced the target action equally frequently by observing the object movement video and observing the unmodified video. In contrast, their performance was much less successful based on the body movement video. In Experiment 3, the performance obtained following the object movement video was similar to that following a further video that emphasized the object movements produced in unsuccessful attempts to produce the target action. These findings suggest that emulation in the form of object movement reenactment or affordance learning plays a role in the social learning of actions on objects during infancy. 相似文献
140.
Roll-over characteristics of able-bodied human subjects walking on ramped surfaces were examined in this study. Ten subjects walked at their normal self-selected speed on a level surface, a 5-deg ramp, and a 10-deg ramped surface. Ramps were designed such that ground reaction forces and center of pressure of the ground reaction forces could be measured on their surfaces. This set-up facilitated calculation of the effective rockers that the ankle-foot (AF) and knee-ankle-foot (KAF) systems conformed to during single-limb stance (contralateral toe off to contralateral heel contact). Since our original "roll-over shapes" were characterized between heel contact and opposite heel contact, we label the shapes found during single-limb stance as "truncated roll-over shapes". We hypothesized that the ankle-foot system would adapt to the various surfaces, creating a roll-over shape that would change in orientation with different levels of inclination. The truncated AF roll-over shapes supported this hypothesis for uphill walking but did not support the hypothesis for downhill walking. However, truncated roll-over shapes of the KAF system did adjust their orientation to match both the positive and negative levels of surface inclination. In general, the ankle appears to be the main adapting joint when walking up inclined surfaces while the knee becomes important for the overall adaptation in downhill walking. Knowledge of physiological lower-limb roll-over characteristics on ramped surfaces may help in the development of biomimetic prostheses and orthoses that will automatically adapt to changes in walking surface inclination. 相似文献