ABSTRACT
The chapter begins with what seems a paradox. The world of experience of any normal man is composed of a tremendous array of discriminably different objects, events, people, impressions. There are estimated to be more than 7 million discriminable colors alone, and in the course of a week or two come in contact with a fair proportion of them. The chapter is fully concerns the categorizing process and its many ramifications. Two broad types of categorizing responses are obviously of interest. One of them is the identity response, the other the equivalence response, and each points to a different kind of category. Certain forms of grouping appear to depend very heavily upon whether or not the things placed in the same class evoke a common affective response. The chapter also discusses the important themes of subsequent chapters of the book.
