A sample of 21 guidance counselors was administered the full battery of Johnson O'Connor Research Foundation aptitude tests to compare scores with the "general population" (norm group). The counselors had worked in public schools, private schools or as self-employed consultants for an average of 10 years. The average age was 42. The tests, which were developed over a sixty-year period, measure a wide range of aptitude areas including perceptual speed, spatial ability, reasoning, dexterity, memory, music and divergent thinking. The guidance counselor sample scored significantly higher than the general population in Ideaphoria (a measure of verbal fluency), Inductive Reasoning (quickness in seeing relationships), and Pitch Discrimination. They also tended to score high in Foresight and Tonal Memory, but the differences from general-population scores were not statistically significant. The high Ideaphoria and Inductive Reasoning scores were expected because the counselor's job appears to use these aptitudes; the high scores on the music tests, however, do not have a ready explanation. (Author/CM)