A study sought to affirm the previously established relationship between irrational beliefs and communication apprehension. Four hundred and fifty-four subjects completed an Irrational Beliefs Test (IBT) and all 24 questions of the Personal Report of Communication Apprehension (PRCA-24) test. Results support the hypothesis that students high in communication apprehension engage in greater amounts of irrational thinking. The data indicate thinking that reflects the Demand for Approval, High Self-expectations, Anxious Overconcern, Problem Avoidance, and Helplessness dimensions of the IBT is particularly associated with communication apprehension. Results also support the claim that the communication apprehension experienced by males is linked more to irrational beliefs than the communication apprehension experienced by females. Results of the IBT were compared using the original scoring method and a revised scoring method. The comparison supports the assertion that Frustration Reactivity is not a verifiable independent scale on the IBT, and that the revised version of the IBT provides purer measures. Improved measures of irrational beliefs would be helpful for speech communication instructors in identifying and assisting students with high communication apprehension. (A three-page reference list and five tables of data are appended.) (SRT)