This study explores three issues regarding the use of multiple workplace communication technologies: the relationships between distinct forms of apprehension (computer, communication, and writing) and use, the relative contribution of computer-mediated communication (CMC) apprehension for predicting use, and changes in these relationships over time. A trend study, which consisted of the collection of data from two samples (N= 205) separated by a 5-year interval, suggests full or partial support for the hypotheses involving computer and communication apprehension. Although apprehension levels remain stable, usage frequency changed for several of the technologies examined—resulting in stronger relationships between apprehensions and those technologies for which use has changed the most in the past 5 years. Most notably, a new measure of CMC apprehension generally predicts communication technology use—especially text-based and conferencing tools—more strongly than do more traditional apprehension types.
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