ASAC 1996 Wynne
نویسنده
چکیده
In a recent study, Straub, Limayem, and Karahanna-Evaristo (1995) found little similarity between self reported measures and computer recorded measures of Information Technology (IT) usage. The between method correlation was assessed as 0.293 and the use of these two sets of measures within a nomological context consisting of perceived usefulness and perceived ease of use from the TAM model (Davis, Bagozzi, & Warshaw, 1989) resulted in different path estimates. The study indicated the possibility of methodological problems (both conceptually and operationally), but also suggested that “research that has relied on subjective measures for both independent variables . . . and dependent variables, such as system usage . . . may not be uncovering true, significant effect, but mere artifacts” (Straub et. al., 1995, p. 1336). Building upon the Straub et al. study, this paper examines these apparent discrepancies by 1) re-examining their study and 2) providing results from a new study using computer recorded measures of usage. In attempting to reconcile the discrepancies, potential misinterpretation due to methodological problems may be part of the reason. More importantly, this paper addresses the question of what constitutes “subjective” versus “objective” IT usage. By considering these issues in more detail, we suggest an alternative interpretation, where computer recorded measures of usage are not necessarily anymore “objective” than self-reported usage. Instead, greater focus is needed to understand the meaning that researchers attribute to such measures. This notion is further elaborated by providing results from the new study where computer recorded usage was found to be consistent with the TAM model.
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