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. 2021 Sep 9;9(9):e27021. doi: 10.2196/27021

Table 2.

Reliability, validity of the constructs, Fornell–Larcker criterion, and HTMT.

Construct Cronbach α alpha CRa AVEb Fornell-Larcker Criterion HTMTc
ATUd HBe BIUf PEOUg POHh PUi ATU HB BIU PEOU POH
ATU .861 0.915 0.783 0.898









HB .899 0.930 0.768 0.703 0.867



0.828



BIU .883 0.920 0.742 0.743 0.711 0.887


0.777 0.788


PEOU .789 0.877 0.703 0.596 0.555 0.556 0.854

0.682 0.663 0.641

POH .844 0.906 0.762 0.722 0.814 0.719 0.544 0.851
0.788 0.776 0.865 0.632
PU .866 0.903 0.651 0.771 0.740 0.771 0.576 0.728 0.811 0.872 0.844 0.822 0.668 0.795

aCR: composite reliability.

bAVE: average variance extracted.

cHTMT: heterotrait-monotrait.

dATU: attitude toward using.

eHB: health benefits.

fBIU: behavioral intention to use.

gPEOU: perceived ease of use.

hPOH: promotion of health.

iPU: perceived usefulness.