Two samples, consisting of 99 high school students and 338 introductory psychology students, completed questionnaires that provided measures of the achievement striving and impatience-irritability components of Type A behaviour, internal locus of control and test anxiety. Results for both samples showed that achievement striving was positively related to internal control and impatience-irritability was negatively related to internal control. Impatience-irritability was positively related to test anxiety but achievement striving and test anxiety were unrelated. The findings help resolve past inconsistent findings concerning relations between Type A behaviour, locus of control and test anxiety. They also underline the importance of studying the separate components of Type A behaviour.