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Table 4 Number of domain items and Cronbach Alpha’s for original and revised TDFQ

From: Measuring implementation behaviour of menu guidelines in the childcare setting: confirmatory factor analysis of a theoretical domains framework questionnaire (TDFQ)

Domain Original TDFQ (75 items) Revised TDFQ (61 items)
  # of items α # of items α
Knowledge 5 0.85 5 0.85
Skills 3 0.61 3 0.61
Professional role and identity 3 0.88 3 0.89
Beliefs about capabilities 6 0.80 6 0.80
Optimism 3 0.67 3 0.67
Beliefs about consequences 8 0.71 4 0.89
Reinforcement 4 0.73 4 0.73
Intentions 4 0.90 4 0.90
Goals 4 0.68 4 0.67
Memory, attention and decision processes 4 0.56 3 0.64
Environmental context and resources 9 0.77 7 0.79
Social influences 6 0.64 4 0.68
Emotion 7 0.89 5 0.88
Behavioural regulation 9 0.76 6 0.80