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Wolverhampton Intellectual Repository and E-Theses > School of Sport, Performing Arts and Leisure > Research Centre for Sport, Exercise and Performance > Sport Performance > Stability of psychometric questionnaires

Please use this identifier to cite or link to this item: http://hdl.handle.net/2436/14655
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Title: Stability of psychometric questionnaires
Authors: Nevill, Alan M.
Lane, Andrew M.
Kilgour, Lindsey J.
Bowes, Neal
Whyte, Gregory P.
Citation: Journal of Sports Sciences 2001, 19(4): 273-278
Publisher: Routledge
Issue Date: 2001
URI: http://hdl.handle.net/2436/14655
DOI: 10.1080/026404101750158358
Additional Links: http://www.informaworld.com/smpp/content?content=10.1080/026404101750158358
http://www.informaworld.com/smpp/title~content=t713721847
Abstract: In 1999, Wilson and Batterham proposed a new approach to assessing the test-retest stability of psychometric questionnaires. They recommended assessing the proportion of agreement - that is, the proportion of participants that record the same response to an item - using a test-retest design. They went on to use a bootstrapping technique to estimate the uncertainty of the proportion of agreement. The aims of this short communication are (1) to demonstrate that the sampling distribution of the proportion of agreement is well known (the binomial distribution), making the technique of 'bootstrapping' redundant, and (2) to suggest a much simpler, more sensitive method of assessing the stability of a psychometric questionnaire, based on the test-retest differences (within-individuals) for each item. Adopting methods similar to Wilson and Batterham, 97 sport students completed the Social Physique Anxiety Scale on two occasions. Test-retest differences were calculated for each item. Our results show that the proportion of agreement ignores the nature of disagreement. Items 4 and 11 showed similar agreement (44.3% and 43.3% respectively), but 89 of the participants (91.8%) differed by just ±1 point when responding to item 4, indicating a relatively stable item. In contrast, only 78 of the participants (80.4%) recorded a difference within ±1 point when responding to item 11, suggesting quite contrasting stability for the two items. We recommend that, when assessing the stability of self-report questionnaires using a 5-point scale, most participants (90%) should record test-retest differences within a reference value of ±1.
Type: Article
Language: en
Description: Metadata only
Keywords: Bootstrapping
Consistency
Measurement
Test-retest
Reliability
Validity
Psychometrics
Sports psychology
ISSN: 02640414,1466447X
Appears in Collections: Sport, Exercise and Health Research Group
Sport Performance
Learning and Teaching in Sport, Exercise and Performance

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