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Effects of an Explicit Value Clarification Method With Computer-Tailored Advice on the Effectiveness of a Web-Based Smoking Cessation Decision Aid: Findings From a Randomized Controlled Trial

Effects of an Explicit Value Clarification Method With Computer-Tailored Advice on the Effectiveness of a Web-Based Smoking Cessation Decision Aid: Findings From a Randomized Controlled Trial

In the case of psychological constructs collected using multiple items (eg, decisional conflict), we assessed scale quality, as proposed by Crutzen and Peters [41], using the Rosetta Stats package in R (R Foundation for Statistical Computing) [42,43] in two steps: (1) investigating scale structure by exploratory factor analysis and (2) calculating omega (Ω) [44] as a less biased alternative to (Cronbach) α.

Thomas Gültzow, Eline Suzanne Smit, Rik Crutzen, Shahab Jolani, Ciska Hoving, Carmen D Dirksen

J Med Internet Res 2022;24(7):e34246