“…For example, consider the relation between abstract and concrete elements of instruction. Some scholars favor abstract presentations to avoid obscuring problem structure (e.g., Bassok & Holyoak, 1989;Harp & Mayer, 1998;Kaminski, Sloutsky, & Heckler, 2008), whereas others favor concrete instances to connect to prior knowledge (Goldstone & Sakamoto, 2003;McNeil, Uttal, Jarvin, & Sternberg, 2009). Many of the relevant studies, however, have used T&P instruction for both conditions.…”