Abstract
Traditional developmental approaches have already accumulated massive information about development over all stages of an entire life. Behavior-analytic approches have revealed fundamental principles and techniques of modifying behavior. Both approaches should be intergrated because the development and lerning (behavior-modification) are related closely and supported by each other . The purpose of the present paper is to consider the defective problems which are concealed in the traditional developmental approaches, and to compare some differences between the conceptions and methods of both approaches. The considerations and comparisons will be made in order to explore the possibility of intergrating them. Some defecitive problems are as follows. (1) Correlational studies tend to discard the precious infomations which each individual furnish. (2) An attermpt to look for the determinants of development and learning, within the skin, could not understand the mechanism of them. (3) Structural, not functional, conceptions about an environment could not explain the functional relationships between behavior and environment. (4) The idea of regarding the development as a process of natural actualization of abilities, with the passage of time, make us hesitate to take a positive attitude toward the facilitation of development, and (5) others.
