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《Journal of motor behavior》2013,45(4):294-304
The authors investigated the relation between hand kinematics and eye movements in 2 variants of a rhythmical Fitts's task in which eye movements were necessary or not necessary. P. M. Fitts's (1954) law held in both conditions with similar slope and marginal differences in hand-kinematic patterns and movement continuity. Movement continuity and eye—hand synchronization were more directly related to movement time than to task index of difficulty. When movement time was decreased to fewer than 350 ms, eye—hand synchronization switched from continuous monitoring to intermittent control. The 1:1 frequency ratio with stable π/6 relative phase changed for 1:3 and 1:5 frequency ratios with less stable phase relations. The authors conclude that eye and hand movements in a rhythmical Fitts's task are dynamically synchronized to produce the best behavioral performance. 相似文献
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Abstract The current pilot study aimed at providing an initial assessment of how anxiety influences police officers’ shooting behavior. Seven police officers participated and completed an identical shooting exercise under two experimental conditions: low anxiety, against a non-threatening opponent, and high anxiety (HA), against a threatening opponent who occasionally shot back using colored soap cartridges. Measurements included shooting accuracy, movement times, head/body orientation, and blink behavior. Results showed that under HA, shooting accuracy decreased. Underlying this degradation of performance, participants acted faster and made themselves smaller to reduce the chance of being hit. Furthermore, they blinked more often, leading to increases in the amount of time participants had their eyes closed. Findings provide support for attentional control theory, hereby also pointing to possible interventions to improve police officers’ shooting performance under pressure. 相似文献
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Movement speed-accuracy trade-off is a function of the space-time constraints of the task. We investigated the space-time account of Hancock and Newell (1985) and the hypothesis of complementarity between the four moments of the error distribution in space and time. Twelve participants performed 15 conditions in a line drawing task composed of different spatial (10, 20, and 30 cm) and temporal (250 to 2,500 ms) criteria. The results showed that all moments of distributions changed systematically between conditions but there were some departures from the Hancock and Newell predictions. In contrast, individual analysis revealed the complementarity of the spatial and temporal error including a trade-off between the four moments of error. These findings support a complementary space-time account of movement speed and accuracy. 相似文献
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Hartmann Scheiblechner 《Psychometrika》2007,72(1):43-67
The (univariate) isotonic psychometric (ISOP) model (Scheiblechner, 1995) is a nonparametric IRT model for dichotomous and
polytomous (rating scale) psychological test data. A weak subject independence axiom W1 postulates that the subjects are ordered
in the same way except for ties (i.e., similarly or isotonically) by all items of a psychological test. A weak item independence
axiom W2 postulates that the order of the items is similar for all subjects. Local independence (LI or W3) is assumed in all
models. With these axioms, sample-free unidimensional ordinal measurements of items and subjects become feasible. A cancellation
axiom (Co) gives, as a result, the additive isotonic psychometric (ADISOP) model and interval scales for subjects and items,
and an independence axiom (W4) gives the completely additive isotonic psychometric (CADISOP) model with an interval scale
for the response variable (Scheiblechner, 1999). The d-ISOP, d-ADISOP, and d-CADISOP models are generalizations to d-dimensional dependent variables (e.g., speed and accuracy of response).
The author would like to thank an Associate Editor and two anonymous referees and also Professor H.H. Schulze for their very
valuable suggestions and corrections. 相似文献
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内隐学习和外显学习关系评述 总被引:24,自引:0,他引:24
文章从内隐学习与外显学习的区别、联系以及相互作用三方面,对这两个概念集合间的关系进行了辨析。最初,内隐学习这一概念的提出,是源于其与外显学习在现象学、实验操作、神经生理学以及学习机制等方面的诸多不同。近年来,虽然内隐学习的独立地位已被充分确立,但是,也有越来越多的证据表明,内隐学习和外显学习之间的独立性是相对的,它们之间存在紧密的联系和相互作用,任何一个学习任务都是内隐和外显学习的结合物。最后,作者结合自己的实验研究进一步提出了,内隐学习和外显学习之间相互权衡的动态关系。 相似文献
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情绪记忆研究最近一致发现了情绪记忆权衡效应,即人们对情绪事件的中心或核心特征的记忆增强,而对情绪事件的周围或背景特征的记忆受损.该效应证明情绪记忆具有选择性,情绪唤醒可以诱发出多种记忆选择性效应,并具有相当强的普遍性和稳定性,同时受较多主、客观因素的影响.相关理论逐步深入地阐述了该效应发生的可能机制,该效应在注意分配、编码以及编码后加工上的行为证据不断积累,但相关神经机制研究十分缺乏.未来研究应重视该效应的神经与遗传机制以及探讨面孔情绪诱发的记忆权衡效应等. 相似文献
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Van Braeckel K Butcher PR Geuze RH Stremmelaar EF Bouma A 《Human movement science》2007,26(6):927-942
We used a modified double-step pointing task to study movement adaptations in 7- to 10-year-old typically developing children. We found that the majority (63%) were able to optimally adapt fast, goal-directed visually-guided movements to a late change in target location meeting the requirements of speed and accuracy. A minority (35%) failed to meet the requirement of accuracy resulting in a less optimal adaptation. The results showed that the ability to adapt movements optimally develops before the age of 7 years in typically developing children. Literature proposes a transition in development of motor control around the age of 8 years. The present results replicate and extend this by suggesting that this transition affects the later phases of fast, goal-directed visually-guided movements rather than the early phases, such as movement programming and acceleration. Finally, the results indicate that the optimally adapted movements were the result of a specific strategy in which a specific component of movement execution was slowed on all trials. This suggests that 7- to 10-year-old typically developing children have developed implicit knowledge about which movement components are the most efficient to adapt. 相似文献