“…The guidelines are also based on research reports of the effective use of graphics, video, and text in procedural instruction (Baggett, 1987(Baggett, & 1989Bieger & Glock, 1982;Mayer & Anderson, 1992;Nugent, 1988;Palmiter & Elkerton, 1993;Palmiter, Elkerton, & Baggett, 1991;Park & Gittelman, 1992;Wetzel et al, 1994) and the use of simulation as an instructional tool (Alessi, 1988;Bennett, 1992;Reigeluth & Schwartz, 1989;Thurman, 1993;Towne & Munro, 1991). We have attempted to relate these references to the literature on cognitive imaging involving mental rotation of objects (Brown & Gallimore, 1995;Cooper & Shepard, 1984) and mental assembly of objects (Finke, 1990;Kosslyn, Reisser, Farah, & Fliegel, 1983).…”