In the following pages, the author attempts to present the reader as well as the research student, with a clear, lucid and comprehensive introduction to the intricacies of the subject of psychology. It deals with all the important basics of the subject and approaches to their understanding in terms of concepts, parameters and processes of psychology. The areas covered include: reasoning intelligence, theories of learning, memory and retention, abnormal psychology and measures of intelligence. The publication will of immense use to both under graduate student as well as researchers and teachers.