Experimental psychology is a branch of psychology, which is a common name for different types of research on mental phenomena through experimental methods. Classicists understood experimental psychology as a system of psychological knowledge obtained on the basis of the empirical study of human and animal behavior (Font, Woodwards, Stevens, Ferris and Piaget). In this understanding, experimental psychology is equated with science and contrasts with the philosophical, introspective, reflective, and humanistic versions of psychology. Today, the term “experimental psychology” is more widely understood and used to describe a scientific system that deals with the problem of psychological research methods in general