(6 December 1933 – 18 December 1999) was an American pediatric psychologist and former president of the American Psychological Association (APA).
He coined the term pediatric psychology, co-founded the Society of Pediatric Psychology (SPP) and made numerous advances within the field.
He was involved in the founding of the American Psychological Society (APS) in the mid-1980s when many psychological scientists split off from the APA.