Overview: Executive processes are defined as those that co-ordinate and monitor other cognitive processes. Some psychological findings relating to executive processes and disorders of executive processing following neurological damage are then reviewed. Following this, discussion turns to the modelling of executive processes. A framework for executive processes and their relation to nonexecutive processes is presented, and an implementation of that framework developed. The framework is applied to the Wisconsin card-sorting test and the six element testtwo common tests of executive function. The chapter concludes with a discussion of some alternative views of executive processes.