This chapter will provide an overview of the Person-Environmen-
-Occupation (PEO) and the Person-Environment Occupation Performance (PEOP)
Models. The PEO model emphasises the importance of congruence between person,
environment, and occupation (PEO fit) and the subsequent occupational performance
within an event. Another ecological model, PEOP, focuses on the client and relevant
intrinsic (person) and extrinsic (environment) influences on the performance of
everyday occupations. The chapter discusses how these models can be applied to
individuals, groups (or organizations), and populations.
Keywords: Environment, Models, Occupation, Person.