Cognitive psychology is "the study of mental or thought processes, including perceiving, recognizing, remembering, imagining, conceptualizing, judging, reasoning, and processing information."
Clinical psychology is "the branch of psychology concerned with the application of psychological theories and methods to clinical problems."
Developmental psychology "deals with the description, explanation, and modification of the ontogenesis (intraindividual, age-related change) of mind and behavior, from conception to death."
Sport psychology is "concerned with the psychological and emotional factors that influence both participation in sports and performance activities and the psychological effects derived from them."
Social psychology is "the study of human interaction, including the unique dynamics of communication, cooperation, competition, leadership, and attitude development."
Experimental psychology is "the scientific investigation of basic behavioral processes including sensation, emotion, and motivation, as well as such cognitive processes as perception, memory, decision making, learning, problem-solving, and language."
"'Learning’ refers to the process by which an animal (human or non-human) interacts with its environment and becomes changed by this experience so that its subsequent behavior is modified."
"Industrial/organizational (I/O) psychology can be defined as the study of behavior that takes place within the context of an organization (e.g., a work setting)."