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Table 2 Phase 2 reliability results (n = 11 paired responses; Shape Up Somerville Community Advisory Council members)

From: Development and testing of a novel survey to assess Stakeholder-driven Community Diffusion of childhood obesity prevention efforts

Constructs and domains # items One-week test-retest reliabilitya Internal scale consistency (Cronbach’s α)b
ICC (95% CI) WSCV (95% CI) Test Retest Average
Knowledge    
Composite 20 0.88 (0.67–0.97) 0.06 (0.04–0.10)    
Domain-specific       
1. Problem 4 0.08 (0.00–1.00) 0.14 (0.09–0.23)
2. Intervention factors 4 0.83 (0.55–0.95) 0.19 (0.11–0.33)
3. Roles 4 0.76 (0.44–0.93) 0.15 (0.09–0.25)
4. Sustainability 4 0.70 (0.34–0.91) 0.13 (0.08–0.21)
5. Resources 4 0.59 (0.21–0.88) 0.23 (0.13–0.40)
Engagement       
Composite 50 0.97 (0.89–0.99) 0.04 (0.03–0.07) 0.98 0.99 0.99
Domain-specific       
1. Dialogue & mutual learning 11 0.96 (0.86–0.99) 0.05 (0.03–0.08) 0.95 0.97 0.96
2. Flexibility 8 0.86 (0.61–0.96) 0.10 (0.06–0.16) 0.92 0.95 0.94
3. Influence & power 4 0.88 (0.67–0.97) 0.15 (0.09–0.26) 0.91 0.95 0.93
4. Leadership & stewardship 22 0.97 (0.90–0.99) 0.04 (0.03–0.07) 0.97 0.98 0.98
5. Trust 5 0.93 (0.78–0.98) 0.07 (0.04–0.11) 0.94 0.97 0.96
  1. ICC intraclass correlation coefficient, WSCV within-subject coefficient of variation, CI confidence interval
  2. aReliability results from T1, i.e., the start of Community Advisory Council members’ involvement in the Shape Up Somerville intervention
  3. bInternal scale consistency was not calculated for the retrospective knowledge survey component. Items were fact-based (multiple choice or true/false), and therefore not expected to relate to each other