General scientific principles and specific psychological principles used in experimental psychology. They are characterized as:

1. The principle of determinism: Experimental psychology is based on the fact that human behavior and mental phenomena are the result of any causes. that is, they are fundamentally explainable.

2. The principle of objectivity: Experimental psychology believes that the object of knowledge is independent of the subject of knowledge; the object can be recognized primarily through action.

3. The falsifiability principle: The requirement proposed by Karl Popper regarding the methodological possibility of refuting a theory claiming to be scientific by conducting a real or essentially potential experiment.

4. The principle of physiological and mental unity: The nervous system ensures the occurrence and course of mental processes. But it is impossible to reduce mental phenomena to physiological processes.

5. The principle of the unity of consciousness and activity: Consciousness is active. and activity is conscious.

Experimental psychology studies the behavior that is formed when a person reacts closely to a situation.

It is expressed by the following function: R=f(P,S). where R is the behavior. P is personality. and S is attitude.

6. The principle of development: Also known as the historicity principle and the genetic principle.

According to this principle. a person’s psyche is the result of long periods of evolution in lineage and upbringing. 7. The principle of structural order: Any mental phenomena should be considered as integrated processes (the effect is always on the psyche as a whole, not on an isolated part of it). not an isolated part of it). (Rummel)