In the scientific literature different kind of systems psychology have been mentioned:

Family systems psychology is a more general name for the subfield of family therapists.

Family Constellations take their form from family systems psychology.

Systems psychology is a branch of psychology that studies human behaviour and experience in complex systems.

In the 1970s the term applied systems psychology was being used as a specialism directly related to engineering psychology and human factor.

Systems psychology has emerged here as a new approach in which groups and individuals, are considered as systems in homeostasis.

(See also systems psychology and systemic therapy.)

More recent developments in systems psychology have challenged this understanding of homeostasis as being too focused on causal understanding of systems.

Cognitive systems psychology is a part of cognitive psychology and like existential psychology, attempts to dissolve the barrier between conscious and the unconscious mind.

In systems psychology "characteristics of organizational behaviour for example individual needs, rewards, expectations, and attributes of the people interacting with the systems are considered in the process in order to create an effective system".

Systems psychology "includes the domain of engineering psychology, but in addition is more concerned with societal systems and with the study of motivational, affective, cognitive and group behavior than is engineering psychology."

Systems sciences are scientific disciplines partly based on systems thinking such as chaos theory, complex systems, control theory, cybernetics, sociotechnical systems theory, systems biology, systems ecology, systems psychology and the already mentioned systems dynamics, systems engineering, and systems theory.