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Table 9 Cronbach alpha in levels. Source: the authors

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

Level N2 N3 N4
Cronbach’s alpha 0.606 0.797 0.653
Average 4.386 4.318 4.039
Variance 0.568 0.572 1.061
N of Items 4 9 7