Semantic Relatedness Effects in Serial Recall But Not in Serial Reconstruction of Order.

Lists of semantically related words are better recalled than lists of unrelated words on immediate serial recall tests. Prominent explanations for this beneficial effect of semantic relatedness, such as the item/order hypothesis, invoke differential contributions of item and order information and predict that on tests that de-emphasize item information, the effect of semantic relatedness will be abolished. The prediction is hard to assess because previous studies using reconstruction of order tests show conflicting and equivocal results. Three experiments are reported that were designed to minimize problems associated with extant studies and that will allow reassessment of the prediction that semantic relatedness will have no effect on reconstruction of order tests. The experiments replicated the usual beneficial effect of semantic relatedness on memory when the test was serial recall but found no effect when the test was reconstruction of order. These results were observed regardless of whether semantic relatedness was defined by category membership (Experiment 1), association (Experiment 2), or meaning (Experiment 3). These results clarify earlier results in the literature and confirm a strong prediction of the item/order hypothesis.