The field of intelligence has had its Jekyll and Hyde sides for me personally, which is why I entered the field in the first place. I became interested in intelligence when, as an elementary-school student, I did poorly on IQ tests. In fact, I did so poorly that in sixth grade I was sent back to a fifth-grade classroom to retake the fifth-grade intelligence test. In a sense, my professional career has been an attempt to understand and come to terms with my own early failures on these tests!