A-C) were compared with a warm-up control condition consisting of 3 unrelated stages (E-F, G-H, A-C). The standard control condition was inferior to all other conditions and the mediated-facilitation condition was not different from the warm-up control condition. These findings were interpreted as indicating that the 3rd-stage performance in mediation and control paradigms of the type employed were determined by interlist-interference mechanisms rather than by mediational processes.

The experiment described was designed to test the generality of the results of Earhard (1967) to the effect that the number of items per cue determines die rate of cuedrecall learning, and that free-recall Ss perform as well as cued Ss under the conditions of six or eight items per cue. The categorized materials in the present experiment did not allow for detection of variations in acquisition rates for lists from six to one items per cue or eight, twelve, or twenty-four items per cue, as had die alphabetized materials, but there was a definite difference between six or less and eight or more items per cue, and free recall Ss performed as well as 6.6 items per cue which exactly replicated the earlier result with alphabetized word lists. IT HAS NOW BEEN REPORTED several times (Mathews, 1954; Tulving &

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