The extent of similarity in concept development for children with and without handicapping

ABSTRACT

This paper examines and integrates findings from six investigations of similarity in concept development for children with and without handicapping conditions. The studies were designed to ensure comparability and are brought together to provide fuller understanding. They were carried out with children who have hearing, language or visual impairments as well as with those termed mentally retarded. Similarity in sequence of development was strongly supported by scalogram analyses in every investigation. The educational implications of common orderings are clear. Similarity in structure was supported in the case of non‐retarded and retarded children with no known organic condition. Further study is needed before conclusions are drawn about structure and retarded children who have organic conditions.