Computerized adaptive testing (CAT) provides a score as well as item response times. However, the investigation of what additional meaning may result from response time information is of particular interest. Data from 5,912 young men on a computerized adaptive test were available. Earlier studies indicate longer response times for wrong responses. This was replicated in larger settings. However, average item response time for wrong and right responses do not show any differential interpretations of score, nor do they correlate differently with several proficiency tests. Discussion is made as to whether or not response times should be interpreted on the same proficiency dimension as the CAT measured trait or on other dimensions. Since the early 1930’s response times have been considered as indicators for personality traits which should be differentiated from scores. This idea is discussed and pro and contra arguments are offered. Recent modeling approaches are also presented. The question remains whether additional diagnostic information is to be gained from CAT with detailed and programmed test-taking protocols. Key words: computerized adaptive testing, response times, differential predictability.