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Table 3 Discriminant validity matrix for the heterotrait-monotrait ratio of correlations for perceived usefulness (PU), perceived ease of use (PEOU), and behavioral intention (BI)

From: Technology acceptance of four digital learning technologies (classroom response system, classroom chat, e-lectures, and mobile virtual reality) after three months’ usage

Tool   PU PEOU
CC PU   
PEOU 0.476  
BI 0.809 0.367
CRS PU   
PEOU 0.576  
BI 0.811 0.602
E-lectures PU   
PEOU 0.415  
BI 0.852 0.19
Virtual Reality PU   
PEOU 0.311  
BI 0.912 0.318