An empirical typology of subjects within stage of change☆
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Replicating cluster subtypes for the prevention of adolescent smoking and alcohol use
2015, Addictive BehaviorsCitation Excerpt :The procedure groups individuals into categories based on the level, scatter, and shape of the patterns (Cronbach & Gleser, 1953). Cluster analyses have been utilized to explore data from TTM-based interventions in past studies; multiple studies (Anatchkova, Velicer, & Prochaska, 2005, 2006a,b; Norman, Velicer, Fava, & Prochaska, 2000; Velicer, Hughes, Fava, Prochaska, & DiClemente, 1995) have found replicable subtypes of smokers within different TTM stages of change for smoking cessation. These studies identified clusters using three key measures from the TTM: Pros, Cons, and Self-efficacy/Temptations.
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2012, Heart and Lung: Journal of Acute and Critical CareCluster subtypes appropriate for preventing postpartum smoking relapse
2012, Addictive BehaviorsCitation Excerpt :In the simultaneous case, the feedback is based on the profile of the individual across different TTM variables (Levesque, Driskell, & Prochaska, 2008). For smoking cessation, a series of cluster analysis studies starting with Velicer, Hughes, Fava, Prochaska, and DiClemente (1995) have found consistent subtypes within each stage of change. The subtypes have been replicated across multiple samples for smoking cessation (Anatchkova, Velicer, & Prochaska, 2005, 2006a, 2006b; Dijkstra, Bakker, & deVries, 1997; Kremers, Mudde, & deVries, 2001; Norman, Velicer, Fava, & Prochaska, 2000).
Identifying subtypes of dual alcohol and marijuana users: A methodological approach using cluster analysis
2012, Addictive BehaviorsCitation Excerpt :This procedure consists of identifying cases, variable selection, determining distance metric, choosing a hierarchical algorithm, deciding on the number of clusters, cluster interpretation, and the internal and external validation of clusters (Rapkin & Luke, 1993). This method has been widely applied in community and health psychology research (Babor et al., 1992; Humphreys & Rosenheck, 1995; Maibach, Maxfield, Ladin, & Slater, 1996; Norman & Velicer, 2003; Shaw, Shah, Jolly, & Wylie, 2008; Velicer, Hughes, Fava, Prochaska, & DiClemente, 1995). In the current study, we propose to 1) establish the type of association between alcohol and marijuana use, hypothesizing that there is multidimensional relationship between these two substances; 2) identify distinct patterns of dual alcohol and marijuana use; and 3) examine differences in the negative consequences among different patterns of dual substance use.
Motivational profiles of clients seeking methadone maintenance therapy in China
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This research was partially supported by Grants CA 27021 and CA 50087 from the National Cancer Institute.
Early versions of the paper were presented at the Eleventh Annual Meeting of the Society for Behavioral Medicine, April, 1990, Chicago; the American Psychological Association Meeting, August, 1990, Boston, and the American Psychological Association meeting, August, 1991, San Francisco; and the 25th International Congress of Psychology, Brussels, July, 1992.