The Conflict Tactics Scales (CTS) is intended to measure use of nonviolent discipline, psychological aggression, and physical assault in parent-child and other family relationships. Two revisions of the CTS became available in 1996: one designed to measure relationships between partners in a marital, cohabiting, or dating relationship and one to measure parent-child relationships, the CTSPC. The specific objectives of this chapter are to provide: (1) examples of applications of the CTS to research on child maltreatment that illustrate potential uses; (2) theoretical rationale underlying both the CTS and the CTSPC; (3) description of the subscales and scoring methods to measure different levels of maltreatment; (4) data on validity and reliability; and (5) assessment of the CTS both in absolute terms and relative to other measures of child maltreatment. Note, table, appendixes, references