"By far the most important person in my career, of course, was Hans Eysenck. I spent two years with him as a postdoc and another year on my first sabbatical leave from Berkeley. From his writings, I had great expectations of Eysenck when I went to England to work in his department, and they were more than fulfilled. Eysenck was a kind of genius, or at least a person of very unusual talents, and the only person of that unusual caliber that I have come across in the field of psychology. I have known a number of very capable and truly outstanding persons in psychology, and persons whose scientific contributions are on a par with, or may even exceed, Eysenck’s, but none who were what I would think of as some kind of phenomenon. I got perhaps as much as 90 percent of my attitudes about psychology and science from Eysenck. The three years I spent in his department have been a lasting source of inspiration. I dread to think where my own career might have gone had I never made the Eysenck connection. I think Eysenck was a great man and have written in detail about my impressions of him."