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Table 6 The MIIC and the Cronbach’s α coefficient of each factor and the whole AHRKAAS

From: Development and testing of the reliability and validity of the adolescent haze related knowledge awareness assessment scale (AHRKAAS)

Factor Number of Items MIIC Cronbach’s α
Factor 1 7 0.652 0.928
Factor 2 4 0.530 0.819
Factor 3 9 0.567 0.922
Factor 4 5 0.519 0.839
AHRKAAS 25 0.329 0.923
  1. Factor 1, the cognition of factitious factors of haze formation; Factor 2, the cognition of natural factors of haze formation; Factor 3, the cognition of haze harms on human body; Factor 4, the cognition of haze health protection measures. MIIC, mean inter-item correlation coefficients