Modality And Encoding Strategy Effects On A Verification Task With Accelerated Speech, Visual Text, And Tones
Nees, Michael A.
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An experiment examined performance on a speeded comparison verification task with accelerated speech (spearcons), visual text, and auditory tones (sonifications). ParticipantsÕ task was to encode the state (increasing or decreasing) of a stock depicted in the first (study) stimulus for comparison with the state depicted in the second (verification) stimulus. We also instructed participants to remember the study stimulus according to a prescribed encoding strategyÑeither as words (a verbal working memory processing code) or tones (a tonal, auditory imagery working memory processing code). Results generally offered evidence that the accelerated speech stimuli assumed the same verbal working memory code as the visual text stimuli. Interestingly, however, both speech and tones also exhibited lingering, stimulus-specific perceptual effects during verification despite recoding in working memory. Results are discussed in terms of auditory imagery in working memory, and the relevance of results to auditory interface design is discussed.