Psychology is a discipline which involves the scientific study of mental processes and behaviors. These studied mental processes as cognition, behavior, human relationships, emotion and perception helps psychologists in a better understanding of human's activity. We also see that current psychological science incorporates physiological and neurological processes into its conceptions of mental functioning. Exploring psychology, as well as psychophysics, began with the development of the experimental scientific method by Ibn al-Haytham (Alhacen) in the 1010s!!! The root psyche is very roughly equivalent to "soul" in Greek, and ology equivalent to "study". Read more at Pregnancy and baby care and in French at psycho-énergie.