a humanistic psychologist who proposed humanistic psychology as a third force?in reaction to theperspectives of psychoanalysis andbehaviourism,and the belief that humans are essentially good. Maslows 'hierachyof needs'proposes a psychological structureof needs and tendencies, whereby basic needs (e.g. hunger) must be satisfied before higher needs(e.g. self-esteem) can be achieved, towards an ultimate goal of self-actualisation.
a research design based on selecting representative groupswho vary on a particular characteristic; when thecharacteristic is age, this design provides a means ofmaking developmental comparisons.