Vries, S. de (Simon) (2017) Eye-hand coupling in a repetitive Fitts’ task. thesis, Human Movement Sciences.
Full text available on request.Abstract
In the cyclical version of the Fitts’ task, hand movements go through a transition from continuous to more discrete movements when the Index of Difficulty(ID) increases (e.g. Huys, Fernandez, Bootsma & Jirsa, 2010). Other research suggests at high ID (small target), the eyes fixate the targets at every movement, while at low ID (large target) intermittent monitoring is used (Lazarri, Mottet & Vercher, 2009). The present study further investigates the eye-hand coupling in a cyclical Fitts' task by looking at possible dissociation of the effects of changing ID through changes in either width or distance of the targets and examining hysteresis effects. To this aim, 14 participants performed a cyclical Fitts’ task while both hand and eye movements were recorded simultaneously. The results show that the transition in eye-hand synchronization (4.85 bit; 0.81 s) and in hand dynamics(2.87 bit; 0.25 s) did not co-occur, nor were they correlated. Though some dissociation between width and distance conditions was found and marginal hysteresis effects were shown in the distance-scaling condition, differences between experimental conditions disappeared when eye-hand synchronization was viewed as a function of movement time (MT) rather than ID. The authors conclude that eye-hand synchronization depends more lawfully on MT than on ID and that a minimal saccade time is the limiting factor in eye-hand synchronization. Additionally, the timing between start of the hand movement and start of the saccade appeared to be relatively constant at 0.15 s and close to independent of ID and MT, implying a constant delay that should be implemented in future dynamical systems models on eye-hand coordination.
| Item Type: | Thesis (UNSPECIFIED) |
|---|---|
| Supervisor name: | Withagen, R. and Huys, R. |
| Faculty: | Medical Sciences |
| Date Deposited: | 11 May 2022 09:58 |
| Last Modified: | 11 May 2022 09:58 |
| URI: | https://umcg.studenttheses.ub.rug.nl/id/eprint/3278 |
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