1. Bell-Dolan, D. (1985). In defense of the 100 in percentage agreement formulas, the Behavior Therapist, 8, 107.
2. Hawkins, R. P. (1983). A frequent error in calculation or reporting of interobserver agreement. the Behavior Therapist, 6, 109.
3. Webster’s New World Dictionary of the American Language. (1962). New York: The World Publishing Company.