Interaction of hand orientations during familiarization of a goal-directed aiming task

Amini, Elaheh and Yusof, Ashril and Riek, Stephan and Selvanayagam, Victor Selvarajah (2022) Interaction of hand orientations during familiarization of a goal-directed aiming task. Human Movement Science, 83. ISSN 0167-9457, DOI

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The purpose of the present study was to examine errors for an isometric goal-directed aiming task during familiarization at different hand orientation. Interaction between neutral and pronated hand orientations with and without directional feedback would provide insights into short-term adaptations and the nature of control. In this study, 30 healthy right-handed adults (age, 22.7 +/- 3.1 years; weight, 69.4 +/- 16.6 kg; height, 166.7 +/- 7.9 cm) were randomly assigned to neutral or pronated hand orientation conditions. To assess familiarization, participants performed ten sets (16 targets/set) of goal-directed aiming task with continuous visual feedback towards targets symmetrically distributed about the origin. Following familiarization, participants then completed eight sets; four sets with and four sets without directional feedback, in an alternated order. For both hand orientations, directional errors were reduced in the first two sets (p < 0.05), suggesting only three sets were required for familiarization. Additionally, the learning rate was also similar for both hand orientations. Following familiarization, aiming errors without feedback were significantly higher than with feedback while no change between sets was observed, regardless of hand orientation. Aiming errors were reduced in the early phase with and without visual feedback, however, in the late phase, errors were corrected when visual feedback was provided. It suggests that hand orientation does not affect familiarization, and mechanisms similar to rapid learning may be involved. It is probable that learning is consolidated during familiarization along with feedforward input to maintain performance. In addition, proprioceptive feedback plays a role in reducing errors early, while the online visual feedback plays a role in reducing errors later, independent of hand orientation.

Item Type: Article
Funders: Universiti Malaya [Grant No: PG043-2014B], Ministry of Higher Education Malaysia Fundamental Research Grant Scheme (FRGS) [Grant No: FP014-2016]
Uncontrolled Keywords: Goal-directed aiming; Rapid learning; Short-term adaptation; Directional feedback; Spatial orientation
Subjects: B Philosophy. Psychology. Religion > BF Psychology
R Medicine > RC Internal medicine > RC1200 Sports Medicine
Divisions: Faculty of Sports and Exercise Science (formerly known as Centre for Sports & Exercise Sciences)
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 12 Oct 2023 08:05
Last Modified: 12 Oct 2023 08:05

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