This study developed and assessed a set of psychometric tests to aid selection of candidate simultaneous and consecutive interpreter trainees. Three kinds of test were used based either on text materials, linguistic subskills or speed stress Twelve tests in all were administered to 29 trainees beginning an intensive course. The test scores were correlated with judges' ratings in the final interpreting examination. Students who passed the examination had higher mean scores on all tests than those who failed (significant for seven tests). Test scores were positively inter‐correlated. Of the two factors characterizing the pattern of correlations, the first loaded highly on completion/detection tests and simultaneous examination ratings; the second loaded highly on recall tests and consecutive examination ratings. Text‐based tests were more predictive than subskills or speed stress tests. It is concluded that tests would aid candidate selection, and estimates of improved selection are given. The relationship between test type and interpreting is discussed together with possible reasons underlying differential performance on tests of the same k