WHAT ARE the psychological forces that influence curriculum decisions? The immediate and traditional response of many educators includes three areas related to the pupil: principles of learning, characteristics of physical growth and development, and personality factors. The inference customarily made is that possession of accurate information in each area would aid one in making valid decisions about the curriculum.However, other answers to this question are possible; and an alternative, although seemingly more complicated, was selected. In addition to the characteristics of learners and the learning process, psychological factors that influence curriculum decisions were considered to include the situational variables that are manipulated in the school environment to promote learning as well as the skills and the abilities that accrue to the learner as a result of education. This chapter will be concerned with recent research that gives informa tion about four areas: the characteristics of learners, the process of learn ing, the effects of different tasks and methods, and the definition of various skills and abilities that can be viewed as outcomes of school learning. It is intended that this chapter not only will direct attention to the already existing and extensive reviews of psychological research but also will evaluate some current research that appears promising. Moreover, it will suggest areas in which more research or a different approach appears appropriate. The distinction between social and psychological forces is arbitrary at times. Chapter III of this REVIEW is concerned with many of the forces that could be classified as psychological within the framework of an alternative organization.