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Experimental Aging Research
An International Journal Devoted to the Scientific Study of the Aging Process
Volume 44, 2018 - Issue 2
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Original Articles

The irrelevant speech effect among younger and older adults: The influence of background noises on reading comprehension

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Pages 162-178 | Published online: 10 Jan 2018
 

ABSTRACT

Background: Aging could exacerbate the decreases in cognitive functioning already caused by noise pollution. According to the inhibitory deficit hypothesis, older adults have more difficulty than do younger adults keeping irrelevant information from interfering with processing of relevant information. However, irrelevant speech studies typically fail to support this hypothesis. The present study aimed to quantify the effects of age and noise pollution on reading comprehension.

Methods: Seventeen younger (age 21–29) and 15 older (age 62–77) adults completed a reading task (reading discourse material for a follow-up comprehension test) in the presence of six irrelevant background noise conditions. Repeated measures ANOVAs and t tests were used to analyze participant accuracy on the follow-up comprehension tests.

Results: Contrary to the inhibitory deficit hypothesis, but congruent with previous irrelevant speech studies, younger and older adults did not have significantly different reading comprehension scores, and both groups’ accuracy was greatest when asked to read in silence. Noise conditions that contained English speech, regardless of whether this background noise was spoken or sung, were most disruptive.

Conclusion: Younger and older adults appear to be equally influenced by irrelevant background material when reading. Regardless of age, reading in a distraction-free environment whenever possible is the best way to maximize reading comprehension.

Acknowledgments

We thank Ashley Ward for assistance in gathering data and throughout the preparation of this manuscript. We also thank Genevieve Vrana for her assistance in preparing and recording the stimulus material. We are also grateful to Mitchell Sommers, Pascal Van Gerven, Natalee Clarkson, Jessica Tanner, Aimee Surprenant and two anonymous reviewers for their helpful comments on an earlier version of this manuscript. A portion of this research was presented at the 11th Cognitive Aging Conference, in Atlanta Georgia in April 2006.

Additional information

Funding

This research was supported by a grant from the Natural Sciences and Engineering Research Council of Canada (NSERC) to Dana R. Murphy.

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