Enhancement,extension, and reversal of the frequency selectivity effect |
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Authors: | Email author" target="_blank">Todd?A?MondorEmail author Jennifer?Hurlburt Lisa?Gammell |
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Institution: | (1) P404, Duff Roblin Bldg., Department of Psychology, University of Manitoba, Winnipeg, MB, Canada, R3T 2N2 |
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Abstract: | The influence of a frequency cue on judgments of whether or not a subsequent target incorporated a brief silent gap was examined.
In Experiment 1, there was no predictive frequency relation and evidence of auditory inhibition of return was obtained with
frequency repetitions, producing a facilitative effect at 175-msec stimulus onset asynchrony (SOA) and an inhibitory effect
at 775-msec SOA. Relative to this baseline performance pattern, increasing the probability of a frequency match to .75 (Experiment
2) served to generate a beneficial effect of frequency repetitions at lengthy SOAs and to enlarge its magnitude at 175-msec
SOA. In contrast, a reduction in the probability of a frequency match to .25 (Experiment 3) resulted in the elimination of
any facilitative effect of repetition at 175-msec SOA and the development of an inhibitory effect at 475- and 1,075-msec SOA.
These results establish that a frequency cue may engage both exogenous and endogenous attentional processes within 175 msec
following its presentation. |
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Keywords: | |
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