Construct validity of a mammography processes of change scale and invariance by stage of change

Sandi L. Pruitt, Amy McQueen, Jasmin A. Tiro, William Rakowski, Carlo C. Diclemente, Sally W. Vernon

Research output: Contribution to journalArticle

14 Scopus citations

Abstract

The development and use of validated processes of change (POC) measures have received little attention in the literature despite their importance in the Transtheoretical Model. Using survey data (N = 2909), we examined the construct validity of a 22-item mammography POC scale by testing for factorial validity and factorial invariance across stage of change. We also used MANOVA with Tukey post-hoc tests to confirm stage differences in POC use (concurrent validity). Our results confirm the a priori correlated four-factor structure of this scale and provide some support for the measurement equivalence of this scale across stage, supporting comparisons of POC use across stage.

Original languageEnglish (US)
Pages (from-to)64-74
Number of pages11
JournalJournal of Health Psychology
Volume15
Issue number1
DOIs
StatePublished - Jan 2010

Keywords

  • Behavior change
  • Mammography
  • Processes of change
  • Stages of change
  • Transtheoretical Model

ASJC Scopus subject areas

  • Applied Psychology

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