The Gessell Developmental Examination was employed to trace the development of gross motor behavior in a female gorilla from the age of 18 days-21 months. The rate of development in the early months was found to be at least twice as fast as that in humans. Although similar to the human developmental pattern, the pattern in the gorilla did not show as clearly the cephalocaudal development of motor behavior. From Psyc Abstracts 36:02:2EA59K. (PsycINFO Database Record (c) 2006 APA, all rights reserved)