Determining optimal trial size using sequential analysis

Journal article


Taylor, Paul G., Lee, Kwee-Yum, Landeo, Paul, O'Meara, Damien M. and Millett, Emma L.. (2015). Determining optimal trial size using sequential analysis. Journal of Sports Sciences. 33(3), pp. 300 - 308. https://doi.org/10.1080/02640414.2014.942679
AuthorsTaylor, Paul G., Lee, Kwee-Yum, Landeo, Paul, O'Meara, Damien M. and Millett, Emma L.
Abstract

When characterising typical human movement profiles, the optimal number of trials analysed for each participant should ensure a stable mean. Sequential analysis is one method able to establish the number of trials to stability by assessing a moving point mean against a set bandwidth. As the total trial number determining this bandwidth is selected arbitrarily, the effect of applying different total trial numbers on the results of sequential analysis was investigated. Twenty participants performed 30 trials of overarm throwing, and sequential analyses were applied to three dimensional (3-D) kinematic data over 10, 20 and 30 trial numbers. We found a total of 20 to be the preferred trial number for sequential analyses. Erroneous results were produced consistently by 10 trial number groups, while moving point means were statistically unchanged after the 10th trial. Subsequently, sequential analyses were applied to 20 trials to establish trials to stability in discrete and time series elements of the 3-D kinematic data. The results suggest that a trial size between 13 and 17 provides stable means for overarm throwing kinematics.

Keywordssequential analysis; mean stability; trial size; overarm throw; kinematic profile
Year2015
JournalJournal of Sports Sciences
Journal citation33 (3), pp. 300 - 308
PublisherRoutledge
ISSN0264-0414
Digital Object Identifier (DOI)https://doi.org/10.1080/02640414.2014.942679
Scopus EID2-s2.0-84919845363
Open accessOpen access
Page range300 - 308
Research GroupSports Performance, Recovery, Injury and New Technologies (SPRINT) Research Centre
Author's accepted manuscript
Publisher's version
Additional information

Authors accepted manuscript. This is an Accepted Manuscript of an article published by Taylor & Francis in Journal of Sports Sciences on 01 August 2014, available online: [http://www.tandfonline.com/10.1080/02640414.2014.942679] http://www.tandfonline.com/10.1080/02640414.2014.942679

Place of publicationUnited Kingdom
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