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- W2891408446 abstract "In a cyclical Fitts’ task, hand movements transition from continuous to discrete movements when the Index of Difficulty (ID) increases. Moreover, at high ID (small target), the eyes saccade to and subsequently fixate the targets at every movement, while at low ID (large target) intermittent monitoring is used. By hypothesis, the (periodic) gaze shifts are abandoned for movement times shorter than about 0.350 s due to systemic constraints (i.e., a refractory period and intrinsic latency). If so, the transition in eye and hand movements is independent. To investigate these issues, the present study examined the effects of changing ID via the targets’ width or distance as well as hysteresis in eye–hand coordination. To this aim, 14 participants performed a cyclical Fitts’ task while their hand and eye movements were recorded simultaneously. The results show that the transition in eye–hand synchronization (at 2.87 bit; 0.25 s) and in hand dynamics (at 4.85 bit; 0.81 s) neither co-occurred nor correlated. Some small width vs. distance dissociations and hysteresis effects were found, but they disappeared when eye–hand synchronization was viewed as a function of movement time rather than ID. This confirms that a minimal between-saccade time is the limiting factor in eye–hand synchronization. Additionally, the timing between the start of the hand movement and the saccade appeared to be relatively constant (at 0.15 s) and independent of movement time, implying a constant delay that should be implemented in a dynamical model of eye–hand coordination." @default.
- W2891408446 created "2018-09-27" @default.
- W2891408446 creator A5073500893 @default.
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- W2891408446 date "2018-09-04" @default.
- W2891408446 modified "2023-10-06" @default.
- W2891408446 title "Keeping your eye on the target: eye–hand coordination in a repetitive Fitts’ task" @default.
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- W2891408446 doi "https://doi.org/10.1007/s00221-018-5369-1" @default.
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