A previous study by Gibson et al. (1972) that investigated the effect of orthographic structure on letter search was replicated and extended in order to identify factors that might explain the apparent discrepancy between their results and those of comparable studies. Experiment one tested whether the discrepancy might be explained by difference…

In six experiments subjects saw and pronounced, either aloud or silently, seven-item lists made from vocabularies of phonologically identical items. These materials were used to test the predictions of a precategorical and a postcategorical hypotheses for the modality effect in immediate memory. (Author/SW)