The fundamental assumptions, principles, and procedures of behaviour modification are described and illustrated by applications to normal and abnormal human behaviour. Students may also conduct supervised projects in applied areas or in basic behavioural research. Students may not hold credit for both PSYC 2440 and PSYC 2441. Prerequisite: [PSYC 1200 or the former PSYC 1201] or [PSYC 1211 and PSYC 1221] or written consent of department head.