"Experimental psychology" is Experimental psychology refers to work done by those who apply experimental methods to psychological study and the processes that underlie it. Experimental psychologists employ human participants and animal subjects to study a great many topics, including (among others) sensation & perception, memory, cognition, learning, motivation, emotion; developmental processes, social psychology, and the neural substrates of all of these.
A few scholars of "Experimental psychology" include Wilhelm Wundt, Charles Bell, Charles Sanders Peirce.
Empiricism, Testability, Determinism, Parsimony are a few categories of "Experimental psychology".
Some motivations are Experimental psychology emerged as a modern academic discipline in the 19th century when Wilhelm Wundt introduced a mathematical and experimental approach to the field. Wundt founded the first psychology laboratory in Leipzig, Germany. Other experimental psychologists, including Hermann Ebbinghaus and Edward Titchener, included introspection among their experimental methods.