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Table 2 Final Cronbach’s Alpha scores for internal validity of items in each construct of the Theory of Planned Behavior

From: Understanding why low-risk patients accept vaccines: a socio-behavioral approach

Construct Number of survey items Cronbach’s Alpha
Attitudes 6 0.95
Subjective norms 7 0.70
Perceived behavioral control 4 0.81
Behavioral intention 3 0.70