“…The most important criticism of Slamecka's series of experiments is that when categorized lists were used (1968, Experiment IV), Ss did not receive more categories (higher-order units) than they could have recalled without the use of external retrieval cues. Several Es have shown that when Ss receive either category names or items from the categories as retrieval cues when there are more categories in the list than could have been recalled without the aid of cues, recall is improved over that obtained in free recall conditions (Tulving & Pearlstone, 1966;Hudson & Austin, 1970;Wood, 1969;Lewis, 1971;Luek, McLaughlin, & Cicala, 1971;Kintsch & Kalk, 1972;Slamecka, 1972). The effect is always detected in measures of the number of categories recalled (defined as the recall of any item in the category) rather than in measures of the number of words per category recalled, It has been almost impossible to show that, contrary to the Slamecka result, cueing aids the recall of lists of unrelated words.…”