Relative importance of aptitude and prior domain knowledge on immediate and delayed posttests.

Two groups of college students were given a pretest covering basketball knowledge and asked to read a passage about basketball history. One group (IDP) took an immediate posttest of 27 items and a delayed posttest 1 week later of the original items and 27 new items. The 2nd group (DPO) took only the delayed posttest of 54 items. Finally, a control group simply took the pretest and the 54-item posttest and scored at chance level on the posttest. Correlational analyses determined that, for the IDP group, pretest scores were significantly related to the immediate posttest