Figure 1.

Basic procedures for the bimodal condition in each of the five experiments. Characters outside of the rectangles represent spoken stimuli, which differed in voice according to the loudspeaker location (for Experiments 1-4) and varied in duration as described in the text. The different typefaces of the digits represent different voices. For Experiment 4, only one of two orders of the memory sets is shown; an auditory-visual order was used on other trials. In the illustration of Experiment 5, the list of three different intervals represent mask delays of 600, 1000, of 2000 ms, respectively, and, for the mask-to-probe interval, the two lists represent intervals for memory delays of 3000 or 4000 ms.