“…Some studies have focused on the whole class as the group (Andrews, 1970;Dietz and Repp, 1973;Eleftherios, Shoudt, and Strang, 1972;Gallagher, Sulzbacher, and Shores, 1967;Glynn, Thomas, and Shee, 1973;Graubard, 1969;Graubard, Lanier, Weisert, and Miller, 1970;Hall, Fox, Willard, Goldsmith, Emerson, Owen, Davis, and Porcia, 1971;Hall, Panyan, Rabon, and Broden, 1968;Hotchkiss, 1966;Jacobs, 1970;McNamara, 1971;Packard, 1970;Prentice, 1970;Schmidt and Ulrich, 1969;Sulzbacher and Houser, 1968;Turknett, 1971;Walker and Hops, 1973;Willis and Crowder, 1972;Wilson, 1971;Wilson and Hopkins, 1973). Other studies have focused on dividing the class into small groups or teams that are either competitive (Barrish, Saunders, and Wolf, 1969;Maloney and Hopkins, 1973;Robertshaw and Hiebert, 1973) or noncompetitive (Harris and Sherman, 1973;Koch and Breyer, 1974;Medland and Stachnik, 1972;Quesenbery, 1971;Simmons and Wasik, 1973;Sloggett, 1971;Wilson and Williams, 1973;Witte, 1971).…”