Mental Retardation in Animals.

The article examines the behavioral defects and mental deficiency in a population of animals. The animal subjects were analyzed for differences in behavior, especially of learned behavior. As indicated, the changing emphasis regarding the etiological factors in mental deficiency for animals is discussed. Research has been conducted relating heredity to adaptive behavior in animal models using psychometrics represented by the mental test movement and prevailing methodologies in plant and animal husbandry.