Many researchers and practitioners describe electronic mail (e-mail) and voice mail (v-mail) together and assume that their usage and impacts are similar. However, empirical evidence on the issue is mixed. For example, whereas some research found similar relations to hold across both e-mail and v-mail, other research presents evidence suggesting that e-mail and v-mail are used differently and their impacts are distinct. This research investigates whether theories derived and tested with respect to e-mail are generalizable to v-mail. Specifically, the research examines whether the antecedents of e-mail use are different than the antecedents of v-mail use. To do so, the research tests a theoretical model for both e-mail and v-mail usage in the same organization. This model expands the technology acceptance model (TAM) to incorporate antecedents of perceived usefulness (PU) and perceived ease of use (PEU). These antecedents, which are based on theories of communications media choice and use, include social i...
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