Reciprocal determinism is the assumption that environmental events, observable behavior, and person variables reciprocally influence each other. This term was created by Bandura and according to him, how we think can influence our environment- through environments we are in and how we perceive them. Reciprocal determinism stimulated the development of cognitive- behavior therapy. This therapy treats psychological disorders by altering environmental variables and cognitive processes. Cognitive-behavior therapy can be used to help individuals with disorders such as anxiety and depression. The attached video explains this evidence based therapy it great detail.