Bakker, L. (Lisette) (2016) Drift: And its effect on calibration in the tennis serve. thesis, Sport Sciences.
Full text available on request.Abstract
Drift is a phenomenon that may appear in repetitive tasks when vision is occluded. Not all vision-occlusion studies control for this risk. The risk of drift affecting conclusions is also present in Wagtho’s (2015) experiment, the experiment considered in the present thesis. In Wagtho’s (2015) experiment twelve participants were asked to serve as hard and accurate as possible and vision was occluded just after ball contact. After each and every trial, participants had to indicate where he intended to place the ball on a scaled notification paper of the service box. Actual ball landing was captured by a full HD-camera with 50 fps and footage was later analysed in Kinovea. Drift in this case will occur as a bigger difference between actual ball landing and intended serve location. Repeated measures ANOVA’s did not reveal the appearance of drift, which suggest that the results of Wagtho’s (2015) experiment are reliable. One of the reasons that drift did not appear in this research can be the case because participants were only occluded for 12 trials in a row and after each game (12 trials) some test trials were performed to recalibrate, which is rather short compared to other studies with 180 trials without feedback. These results do presume that drift will not occur that easy, but from previous research the opposite is known especially if the occlusion period is longer. It is important that researchers are aware of this phenomenon and examine for it during repetitive vision-occlusion studies.
| Item Type: | Thesis (UNSPECIFIED) |
|---|---|
| Supervisor name: | Zaal, F. (Frank) and Pepping, G.J. (Gert-Jan) |
| Faculty: | Medical Sciences |
| Date Deposited: | 20 Apr 2022 09:48 |
| Last Modified: | 20 Apr 2022 09:49 |
| URI: | https://umcg.studenttheses.ub.rug.nl/id/eprint/3121 |
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