ABSTRACT
Some approaches to psychology emphasize this biological basis, examining human behavior in an evolutionary context, comparing human behavior with that of other species, or examining its physiological bases. Biological psychology includes any approach to psychology that places it in its biological context; that is, examining the biological bases of behavior. The approach to social behavior that this leads to is known as sociobiology. The direct comparison of human behavior with that of other species is known as comparative psychology. The aim of biological psychology is to explain human mental processes and behavior in biological terms, either evolutionary or physiological. Primates, and in particular human beings, are characterized by the evolution of progressively larger brain size, especially with regard to the cerebral hemispheres. All present day species are equally ‘evolved’, all being the latest step in their line of descent.
