Batterham and Wilson (1999) Stability of questionnaire items in sport and exercise psychology: bootstrap limits of agreement

getCITED

Home Search Add Content Reports Help

Edit Publication | Edit Contributors | Delete Publication | Edit References | Edit Citations

Add to Bookstack | Show Bookstack | Change Bookstack

Stability of questionnaire items in sport and exercise psychology: bootstrap limits of agreement

Post a Comment

CONTRIBUTORS:

	Author:	Wilson, K.
	Author:	Batterham, A.

JOURNAL:

Journal of Sports Sciences (JSS), 17(9), ?? - ??.

YEAR:

1999

PUB TYPE:

Journal Article

SUBJECT(S):

QUESTIONNAIRE; SPORT; EXERCISE; PSYCHOLOGY; TEST-RELIABILITY; MAN; ACCURACY

DISCIPLINE:

No discipline assigned

HTTP:

LANGUAGE:

English

PUB ID:

103-366-704 (Last edited on 2002/02/27 18:44:58 US/Mountain)

SPONSOR(S):

ABSTRACT:
We describe an alternative method for assessing the stability of individual questionnaire items in sport and exercise psychology. To date, the Pearson product-moment correlation coefficient has been widely used in psychometrics. We propose an alternative non-parametric method based on proportion of agreement. Ninety-two male university students completed the revised 9-item Social Physique Anxiety Scale on two occsions, separated by a 2-week interval. Point estimates of the proportion of direct within-individual agreement between the two occasions were calculated separately for each item of the Social Physique Anxiety Scale. Estimates of uncertainty of the agreement were calculated using a bootstrapping resampling technique. For each item, 2000 bootstrap samples (each n = 92 pairs) were redrawn from the original sample. The sample statistic was calculated for each bootstrap sample to provide a bootstrap sampling distribution. The 95 % confidence intervals (CI) were then calculated using the percentile method. The three most problematic items were items 7, 8 and 10 (as labelled in the orginal 12-item scale). These items demonstrated an agreement of 0.46 (95 % CI = 0.36-0.56), 0.42 (95 % CI = 0.33-0.52) and 0.41 (95 % CI = 0.32-0.51) respectively. Our proposed method measures absolute agreement between test-retest responses, is free of normal assumptions, does not depend on high between-individuals variance, and can be applied successfully to individual items in the development of psychological tests.

STATISTICS

Click on # to view
Citations		0
References		0
Comments		0
Quality		0/0.00
Interest		0/0.00
View(er)s		2/334

Quality
	N/A
High
	7
	6
	5
	4
	3
	2
	1
Low

Interest
	N/A
High
	7
	6
	5
	4
	3
	2
	1
Low

Prev | Next