There are many examples of psychological principles being put to use in a variety of fields, most of which are based on the concepts of stimulation, socialization, identity and control. The psychological principle of stimulation, for example, can be a significant factor in promoting creativity or productivity and is often applied in work-group or educational settings. The need for a sense of identity is a psychological principle that is frequently used to create brand-name loyalty in marketing or to develop team spirit in organizational management.
Applied psychology makes use of a variety of psychological principles to enhance outcomes and solve problems in real-world and everyday life situations. In addition to marketing, educational and workplace applications, psychological principles play a role in areas such as product design, traffic control, military strategies, politics and ergonomics. Cognitive and psychological factors, for example, affect the type and degree of interaction that can take place between individuals and the tools, products and machines they use. Psychological principles are also studied and then carefully applied when computer software interfaces and websites are designed.
An often applied psychological principle is the need people have for a sense of control. Marketing strategies incorporate this principle when designing product lines and in the choices that are offered to consumers. A attractive sense of control is created when consumers are offered choices to accommodate a variety of needs and when they are able to see the certainty of a positive outcome resulting from their purchase selection.