Architectural determinism (also sometimes referred to as environmental determinism though that term has a broader meaning) is a theory employed in urbanism, sociology and environmental psychology which claims the built environment is the chief or even sole determinant of social behaviour. A. S. Baum defines the notion thus "In its most extreme form, this position argues that the environment causes certain behaviours, denying any interaction between environment and behaviour. Architectural determinism poses the idea that people can adapt to any arrangement of space and that behaviour in a given environment is caused entirely by the characteristics of the environment."