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Table 12 Total-item statistics for N4. Source: the authors

From: Usability evaluation model of an application with emphasis on collaborative security: an approach from social dimensions

Question Cronbach’s alpha if the item is deleted Question Cronbach’s alpha if the item is deleted
Q7 0.731 Q17 0.537
Q10 0.641 Q20 0.560
Q11 0.631 Q21 0.547
Q15 0.617