Psychology is dedicated to the scientific study of human behaviour and the mind from social, biological and developmental perspectives. The field of Psychology applies concepts, theories and strategies from Social Science, Natural Science and Humanities to explain human behaviour such as thought, feelings, emotions and actions. In order to understand and explain human behaviour and mental processes, specialists in Psychology use techniques such as observation, interpretation and recording of how humans relate with other living organisms in their environment. Techniques for gathering information and studying human behaviour also include controlled laboratory experiments, psychotherapy or psychoanalysis. Sub-fields in Psychology include: Clinical Psychology- assessment, diagnosis & treatment of mental, emotional & behavioural disorders; Developmental Psychology-psychological progress & development that occurs throughout life such as childhood & adolescence; Social Psychology– how peoples mindset & behaviour are shaped by social interactions and Industrial/ Organisational Psychology– psychological principles/research methods that are applied to address problems & improve quality of life at the workplace