J. Ma'ruf, Jasman and Mohamad, Osman and T. Ramayah, T. Ramayah
(2005)
Intention To Purchase Via The Internet:
A Comparison Of Two Theoretical Models.
Asian Academy of Management Journal (AAMJ), 10 (1).
pp. 1-17.
ISSN 1394-2603
Abstract
This study compares two models for predicting intention to purchase via the Internet. The
behavioral intention to purchase via the Internet was examined as a function of attitude
towards purchase, perceived usefulness, and perceived ease of use Technology
Acceptance Model (TAM), or attitude towards purchase, subjective norm, and perceived
risk (Theory of Planned Behavior [TPB]). Results indicate that both models significantly
influenced behavioral intention to purchase. We compared both models, and found
that TPB (adjusted R2 = 0.55) is better than TAM (0.44) in explaining behavioral
intention to purchase (BI). After we integrated TAM and TPB, we found that perceived
risk (β = –0.332) is the primary determinant of BI, with subjective norm (SN) (β = 0.210)
as the significant secondary determinant, followed by attitude (A) towards purchase
(β = 0.175), perceived usefulness (β = 0.159), and perceived ease of use (β = 0.069).
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