“…In contrast, massed trial training is structured to repeatedly present instructional trials for a single task to the student within a single instructional session (Bambara & Warren, 1992;Westling & Fox, 2004). Previous research on distributed trial instruction has found the strategy to be effective with students with developmental disabilities (Bambara, Warren, & Komisar, 1988;Mulligan et al, 1982;Winterling, Dunlap, & O'Neill, 1987;Wolery, Anthony, Caldwell, Snyder, & Morgante, 2002). In addition, comparative studies have found either that distributed and massed trial interventions are equally effective in promoting student learning (Dunlap, 1984;Dunlap & Koegel, 1980;Koegel & Koegel, 1986;A.…”