ABSTRACT
What has come to be known in modern scientific circles as “ comparative psy chology” emerged from man’s early interest in infrahuman animals. It has been suggested that historically this interest may have developed through several sequences (Cooper, 1972). As the focus of attention shifted from one interest to the next, the earlier did not disappear, but continued as functional parts of a growing fascination with infrahuman creatures. Various of these sequences may be grouped into three primary phases.
