“…Recent research (e.g., Pleban, Graves et al, 2011;Pleban, Vaughn, Sidman, Semmens & Geyer, 2011;& Tucker, Semmens, Sidman, Geyer, & Vaughn, 2011;U.S. Army, 2011) provides some support for Clark's (2004) major conclusions, indicating that the effectiveness/utility of a specific training strategy (i.e., direct instruction versus problem centered) will depend on a number of factors such as learning objectives, time allotted for instruction, available resources, preparation of instructor, and level of experience of the learner.…”