The interest in psychology, first aroused by Dallenbach, continued while Lashley was at Hopkins. He was greatly stimulated by contact with Adolf Meyer, professor of psychiatry and director of the newly established Henry Phipps Clinic. While majoring in zoology, Karl took two minors. One was with Meyer, and the other was with a psychologist destined for fame, John B. Watson. The impact of Watson's behavioristic approach was so great diat forty-four years later Lashley asserted, "anyone who knows American psychology today knows that its value derives from biology and from Watson.