Kurt lewin equation: behaviour = f(person, environment, behaviour is a function of the person and the environment. Competence: theoretical upper limit of a person"s capacity to function, depends on. Ego strength: goes broader than adl/iadl, with limited competence in certain aspects of life, it is harder to cope with environmental demands. Environmental press: demands given to the person by the environment. Physical and social: can classify different environments, engineer environmental press in to life. Incorporate social interactions in to life: mp lawton promoted environmental press. Created designs to increase social demands in pgc. Environmental press vs competence: each individual has varying competence and environmental presses, 1. Wider range of ability to function: 2. Narrow range to function: 3. and 4. High competence/low environmental press or low competence/high environmental press. Preventative and corrective proactivity model life stressors + lack of good congruence in person-environment = poor life outcomes: adaptations.