Psychometric Evaluation of a Motivation Assessment in Smokers
No Thumbnail Available
Authors
Meeting name
Sponsors
Date
Journal Title
Format
Thesis
Subject
Abstract
The aim of this dissertation was to describe the psychometric properties of the Brief Motivation Scale used during an intervention for participants who have declared low interest in discontinuing their use of cigarettes. The assessment was presented with other measures of motivation, demographic, and smoking characteristics at baseline and repeated at 12 and 26 weeks. Using principal axis factoring, the Brief Motivation Scale (BMS) was described with a unidimensional construct with excellent internal consistency (alpha = .89). Additional evidence of construct validity included strong correlations (r > .70, p < .001) with other measures of motivation (e.g., Motivation Ruler, Contemplation Ladder, autonomous and controlled motivation scales of the Treatment Self-Regulation Questionnaire; convergent validity) and nonsignificant correlations with measures of constructs different from motivation (e.g., depressive symptoms, extroversion, perceived stress; discriminant validity). Concurrent validity was demonstrated with smaller significant correlations of the BMS with measures of smoking behavior (i.e., lifetime number of previous quit attempts, concurrent quit attempts and biochemically verified 7-day point-prevalence abstinence). Both baseline BMS and BMS change scores were used to demonstrate predictive validity by use of simple correlations and generalized estimating equations to predict smoking behavior (i.e., dichotomous behavioral measures of abstinence/smoking and quit attempt/no quit attempt) at Week 12 and Week 26. The BMS also demonstrated incremental validity as an independent predictor of smoking outcomes above and beyond that observed with other measures of motivation. Limitations and future directions are discussed.
Table of Contents
Introduction -- Literature review -- Method -- Analyses -- Results -- Discussion -- Appendix A. Time to first cigarette score -- Appendix B. Darn-c: motivation/readiness/cofidence to quit smoking -- Appendix C. Treatment self-regulation questionnaire -- Appendix D. Decisional balance scale -- Appendix E. Contemplation ladder -- Appendix F. Importance and confidence rulers -- Appendix G. Smoking abstinence self-efficacy -- Appendix H. Center for Epidemiologic Studies depression scale -- Appendix I. Perceived stress -- Appendix J. Eysenck Personality questionnaire-brief version
DOI
PubMed ID
Degree
Ph.D.