“…Within the group contingency literature several positive features have been documented (e.g., McLaughlin, 1974;Skinner, Cashwell, & Dunn, 1996;Skinner, Skinner, Skinner, & Cashwell, 1999). Researchers have reported the procedures to be time-saving, inexpensive, effective, easy to learn and implement, and easy to manage in a classroom setting (e.g., Barrish et al, 1969;Grandy et al, 1973;Harris & Sherman, 1973;Packard, 1970).…”