Memory knowledge may be necessary but not sufficient for strategy use
because aspects of the individual and the task may mediate the metamem
ory-strategy use relation. Belmont and Mitchell (1987) contended that
learners will be strategic only on tasks perceived to be moderately di
fficult. If correct, metacognitive variables (e.g., metamemory and att
ributional beliefs) would be more likely to predict strategy use on mo
derately difficult tasks. In the study presented here, strategy use, p
erformance, and perceptions of difficulty among students with and with
out retardation were assessed. Results showed that students with menta
l retardation rated tasks as more difficult than did nonretarded stude
nts. Relatedly, brief training resulted in a decrease in difficulty ra
tings only for students without retardation. Although strategy use was
not predicted by metacognitive variables (metamemory and strategy use
) on moderately difficult tasks, metacognitive variables significantly
predicted recall performance, but did so independent of task difficul
ty.