Mechanisms of auditory backward masking in the stimulus suffix effect

    loading  Checking for direct PDF access through Ovid


Gives 4 hypotheses for backward masking by a stimulus suffix of auditory information about the end of an immediate memory list. Masking by erasure (displacement), integration (overwriting), and attentional interruption (diversion of a readout process) was rejected by evidence that (a) multiple suffixes produce a smaller masking effect than single suffixes; (b) a suffix that occurs simultaneously with the last memory item on the list has a smaller effect than one that is delayed by a few hundred milliseconds; and (c) the size of the suffix effect depends on its delay, independent of the rate at which the list was presented. These pieces of evidence are consistent with a masking model based on the operation of lateral inhibition among memory representations of auditory sensory events that are classified by time of arrival and by sensory channel characteristics. A functional model for the suffix effect was constructed from 3 factors believed to depend on the delay between a memory list and a suffix: (a) integration at short list-suffix delays, (b) backward masking through lateral inhibition at longer delays, and (c) readout of target stimulus information at delays of as long as a second or more. (25 ref) (PsycINFO Database Record (c) 2006 APA, all rights reserved)

    loading  Loading Related Articles