In this study, hypotheses for the modality effect based on separate precategorical stores for auditory and visual information were evaluated by presenting additional words auditorily or visually following the presentation of the to-be-remembered words. The major findings were as follows: (a) When the to-be-remembered words were presented auditorily, the recall of recency words was higher for the condition in which additional words were presented visually. (b) When the to-be-remembered words were presented visually, the recall of recency words was the highest for the condition in which the to-be-remembered words were recalled immediately. The following conclusions were drawn from these results: (a) In PAS, information is displaced by additional auditory information. (b) In PVS, information decays more rapidly than in PAS, although PVS can hold information long enough to affect the recall of recency words.