Psychometric properties of the 'Processes of Change' scale for alcohol misuse and its short form (POC-20)

Jennis Freyer*, Karin Bott, Jeannette Riedel, Barbara Wedler, Christian Meyer, Hans Jürgen Rumpf, Ulrich John, Ulfert Hapke

*Corresponding author for this work
15 Citations (Scopus)


Regarding the processes of change, one of the core constructs of the transtheoretical model of intentional behavior change (TTM), extensive research has been done in the field of smoking. However, little is known about the processes of change for alcohol misuse and their measurement. This study's goals were to investigate the psychometric properties of the German Processes of Change (POC) scale and to refine a short version. Method: A sample of 653 non-treatment seeking general hospital patients with alcohol problems was used. Construct validity of the POC was analyzed using confirmatory factor analysis. As another validity aspect the use of processes of change across the stages of change was investigated. Results: Internal consistency of the POC-20 ranged between r = .57 and .94. Construct validity was also good (CFI = .94). In line with TTM postulates subjects in later stages reported more behavioral processes compared to individuals in earlier stages. Conclusion: Findings indicated superiority of the POC-20 over the long version and good validity of the measure in a high per capita consumption nation.

Original languageEnglish
JournalAddictive behaviors
Issue number5
Pages (from-to)821-832
Number of pages12
Publication statusPublished - 05.2006

Research Areas and Centers

  • Academic Focus: Center for Brain, Behavior and Metabolism (CBBM)


Dive into the research topics of 'Psychometric properties of the 'Processes of Change' scale for alcohol misuse and its short form (POC-20)'. Together they form a unique fingerprint.

Cite this