TY - JOUR
T1 - In search of content validity
T2 - Facet analysis as a qualitative method to improve questionnaire design
AU - Landsheer, J.A.
AU - Boeije, H.R.
PY - 2010/1/1
Y1 - 2010/1/1
N2 - In this paper, two scales are examined for the measurement of self-regulation. The item content is evaluated for its specific usefulness for measuring self-regulation of obesity patients. Qualitative facet analysis (QFA), an application of Guttmann's Facet Theory, is used to investigate whether item content sufficiently covers the intended content area. This form of content analysis constitutes a systematic, effective and critical tool for improving the content validity of questionnaires. It discovers topics that are underrepresented or overrepresented. The method offers a way to clarify the relationship between concrete item phrases and the desired content as defined by construct and theory. It allows the researcher to improve his or her understanding of the items as a stimulus and of the similarities of items, and allows the formulation of a possible structure for confirmative factor analysis. Various ways to improve the content of both scales are identified. © Springer Science+Business Media B.V. 2008.
AB - In this paper, two scales are examined for the measurement of self-regulation. The item content is evaluated for its specific usefulness for measuring self-regulation of obesity patients. Qualitative facet analysis (QFA), an application of Guttmann's Facet Theory, is used to investigate whether item content sufficiently covers the intended content area. This form of content analysis constitutes a systematic, effective and critical tool for improving the content validity of questionnaires. It discovers topics that are underrepresented or overrepresented. The method offers a way to clarify the relationship between concrete item phrases and the desired content as defined by construct and theory. It allows the researcher to improve his or her understanding of the items as a stimulus and of the similarities of items, and allows the formulation of a possible structure for confirmative factor analysis. Various ways to improve the content of both scales are identified. © Springer Science+Business Media B.V. 2008.
UR - http://www.scopus.com/inward/record.url?scp=72749089641&partnerID=8YFLogxK
U2 - 10.1007/s11135-008-9179-6
DO - 10.1007/s11135-008-9179-6
M3 - Article
SN - 0033-5177
VL - 44
SP - 59
EP - 69
JO - Quality and Quantity
JF - Quality and Quantity
IS - 1
ER -