ABSTRACT
Psychology should provide society with knowledge about human behaviour. This knowledge is required in social decision making, health care, environmental design, engineering, schooling, government and in many other areas. The human factor in society is increasingly more important, and this entails special requirements for psychologists. Psychological knowledge is normally expressed in the form of theories, laws and individual experimental invariances, but this is not the form society is interested in or can use. Society wants realizable solutions to particular problems rather than general principles produced in the hope of making practical life proceed more smoothly. This implies that general psychological knowledge must be transformed into particular knowledge about individual occurrences.
