This document discusses psychological dimensions of curriculum development. It covers various theories of learning including association theories, field theories, and perceptual theories. Association theories include stimulus-response theory, respondent conditioning, and operant conditioning. Field theories view learning as perceiving wholes rather than parts. Perceptual theories see learning as self-perception. The document also discusses factors that affect learning, such as interests and attitudes, as well as techniques to improve learning like feedback and distributed practice. Overall, it provides an overview of psychological principles relevant to curriculum design and learning.