Variously defined as the science of behaviour or the science of mind, psychology emerged as a distinct discipline in the second half of the 19th century, with the work of researchers such as Wilhelm Wundt (1832–1920) who founded the first experimental laboratory of psychology in Leipzig. Much of the focus of the discipline has been on identifying the general mechanisms involved in processes such as perception, learning, motivation, and memory, although there has been some attention to individual differences, especially in relation to intelligence and personality.
· Some of the Subfields of Psychology
· Clinical psychologists
· Cognitive and perceptual psychologists
· Community psychologists
· Counseling psychologists
· Developmental psychologists
· Educational psychologists
· Engineering psychologists
· Environmental psychologists
· Evolutionary psychologists
· Experimental psychologists
· Forensic psychologists
· Health psychologists
· Industrial/organizational psychologists
· Neuropsychologists (and behavioral neuropsychologists)
· Quantitative and measurement psychologists
· Rehabilitation psychologists
· School psychologists
· Social psychologists
References : APA and Britannica Online Encyclopedia