In this study of the interaction between anxiety trait (A-trait), anxiety state (A-state), and dogmatism in computer-assisted instruction (CAI), subjects were selected on the basis of extreme scores on a measure of anxiety and on a measure of dogmatism. The subjects were presented with a CAI task consisting of difficult mathematical problems. The subject's A-state during the task and number of errors he made on the task were the dependent variables in the study. The hypothesized relationship between dogmatism and A-state was not confirmed. When A-trait was controlled for, subjects did not differ in the level of A-state displayed during the experiment, regardless of their level of dogmatism. As hypothesized, high A-trait subjects had significantly higher levels of A-state during the experiment than low A-trait subjects. Although neither A-trait nor dogmatism was related to errors on the CAI task, a significant interactive effect between mathematics ability and A-state on performance was observed. (JY)