Robert Gregory earned his Ph.D. in clinical psychology from the University of Minnesota where he absorbed a healthy respect for the value of empiricism in psychological testing. He taught at the University of Idaho for 23 years where he also developed a private practice in assessment. In his practice, he specialized in the evaluation of intellectual disability and cognitive impairment. His academic research centers on assessment topics such as subtle cognitive differences in left-handers, the impact of subclinical lead exposure on intelligence, the psychometric qualities of a wide variety of cognitive and personality tests, and meta-analysis. He has taught psychological assessment for almost 40 years. He has been professor of psychology at Wheaton College (Illinois) for fifteen years, including six years as department chair, and five years as director of their doctoral program (Psy.

D.) in clinical psychology.