What is human psychology,it is a very important topic. According to American Psychological association Psychology is the scientific study of the mind and behavior. Psychology includes the study of conscious , unconscious  feeling and thought phenomenon. It is an academic discipline of immense scope.  Psychology is a multifaceted discipline and includes many sub-fields of study such areas as human development, sports, health, clinical, social behavior and cognitive processes. https://www.verywellmind.com/psychology-4014660 The main objective of Psychology is to  Describe Explain Predict and Change of behavior  Sub-Fields of Psychology 1/    Clinical psychologist who assess and treat mental, emotional and behavior disorder. 2/   Cognitive and perceptual psychologist. 3/   Counseling psychologist 4/   Development psychologist 5/  Educational psychologist 6/   Engineering psychologist 7/  Experimental psychologist 8/   Forensic psychologist 9/   Health psychologist 10/  Industrial psychol