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Table 1 ADAPT psychosocial questionnaire reliability summary (N = 287)

From: Alberta Diabetes and Physical Activity Trial (ADAPT): A randomized theory-based efficacy trial for adults with type 2 diabetes - rationale, design, recruitment, evaluation, and dissemination

Construct (theory) Number of items Cronbach's α at baseline References
Planning/Implementation (SCT) 7 .88 [16]
Intention (SCT) 4 .79 [16]
Outcome expectations (SCT) 8 .90 [16]
Pros (SOC) 5 .81 [35]
Cons (SOC) 3 .72 [35]
Attitude (TPB) 6 .86 [15]
Subjective Norm (TPB) 4 .73 [15]
Perceived behavioural control (TPB) 2 .56* [15]
Response Efficacy (PMT) 3 .84 [18]
Severity (PMT) 1 NA [18]
Vulnerability (PMT) 1 NA [18]
Self-Efficacy (TPB/PMT/SCT/SOC) 12 .94 [16, 18, 35]
  1. Note: PMT = protection motivation theory; TPB = theory of planned behaviour; SCT = social cognitive theory; SOC = stages of change
  2. *Pearson correlation