Six Likert-type items measure a consumer's perception of the usefulness of an online retail store, capturing its utility for product search and purchase, performance improvements, speed enhancement, effectiveness, ease, and productivity gains. Adapted from Davis's (1989) perceived usefulness construct, the scale translates the classic technology acceptance model measure to the online retail shopping context.
Vrechopoulos, A. P., O'Keefe, R. M., Doukidis, G. I., & Siomkos, G. J. (2004). Virtual store layout: An experimental comparison in the context of grocery retail. Journal of Retailing, 80(1), 13–22.
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