“…One investigation of advance organizers (Saretsky, 1976) and two studies of adjunct questions (Goudey, 1969;Robinson, 1975) have failed to support the idea of ability-by-treatment interactions with middle grade students. However, the majority of reported adjunct aids studies in which ability was a variable have found significant ability-by-treatment interactions with students of this age (Gagne & Memory, 1978;Hudgins, Dorman, & Harris, 1979;Maher, 1975;Proger, Carter, Mann, Taylor, Bayuk, Morris, & Reckless, 1973;Rickards & Hatcher 1977-78;Watts, 1975) The investigation reported here included two distinct ability levels because of this trend in the results of previous studies.…”