The purpose of this study was to analyze performance on the Relative Movement Test, a part of the U.S. Navy Officer Classification Battery, in order to obtain a better understanding of what the test measures. The findings were as follows: 1. The test seems to provide a measure of spatial and deductive ability. The element of speededness in the regular examination procedure very likely provides a modifying condition, however. 2. Three groups of items were identified: (1) those judged to be primarily spatial, (2) those judged to be primarily deductive, and (3) those judged to be both spatial and deductive to an approximately equal extent. 3. Items judged as primarily spatial were generally the ones that required course or bearing answers, whereas those judged as primarily deductive generally required relative speed answers. 4. There was almost universal agreement among judges that spatial and deductive processes were involved in all but few of the reports. Judges differed among themselves with respect to the predominance of spatial and deductive processes. 5. No subject showed a tendency to employ any one of the above- mentioned processes consistently from item to item. Processes were found to vary more as a function of the item than as a function of the subject.