How do people manage their environments? What processes are basic to the interactions between people and their environments? These questions are central to almost all areas of psychology but in a more narrow sense are the heart of environmental psychology. Some environmental studies focus on the antecedents of person-environment interactions, others on the effects of the environment on the individual, and others on outcomes. Still others focus on the processes by which people attempt to manipulate their surroundings. This volume, the second in a series, is concerned with one of these processes - control, actual and perceived, that individuals exercise over their environment.