The concern about life is a main human characteristic. No matter if his concern is concentrated in himself or in persons or things that surround him and constitute his environment, everybody wants to know why people, himself included, behave the way they behave. Everybody, also, wants to improve his behavior, so as to live in harmony with himself and the society.The Greek word Psychology, is a word consisted of the words ψυχή-soul and λόγος-utterance, talk. So, generally, psychology is the science that examines the soul. But , since the psychologists work on the problems of the personal, family, school, professional and social life, we could say, more accurately , that psychology is the science that studies the psychological life of man, as it is revealed in his behavior.Although psychology seems to be a new science, in fact, is a very old one. Before the 19th century- when psychology acquired its scientific independence- the study of behavior was an aspect of philosophy.There are two directions of psychology: The first, studies the way human exists or behave (or the way it seems to exist or behave). The second, studies the way human can evolve, can get better. This direction studies the principles, the laws and the facts that rule the possible evolution of man.During their research, psychologists put into practice the same methods that the natural sciences(math, physics, biology) use, so as to find the truth: The observations are neat and not aimless The search for truth is impersonal and the aim of collected information is rather to check than to prove certain ideas The repetition of the observations can be executed by other researchers too, under the same conditions BehaviorBehavior is the totality of the psycho-physiological responses of man to internal or external stimulation. The heartbeats, the movements of our head are behavior. The way we eat, the way we...
