Overlap of phonetic features as a determinant of the between-stream phonological similarity effect

Document Type

Article

Abstract

Serial recall from working memory is known to be impaired by the presence of irrelevant background speech, but several prior studies have concluded that the magnitude of the impairment is independent of the phonological relationship between to-be-remembered (TBR) and to-be-ignored (TBI) sources of information. In the present study, we examined the influence of between-stream phonological similarity in serial recall while attending to a heretofore uncontrolled variable, the phonetic feature. We found that TBI items sharing many phonetic features with TBR items produced significantly stronger working-memory impairments than TBI items with minimal phonetic feature overlap. In addition, participants were more likely to report remembering incorrect items that incorporated phonological characteristics of the TBI stream in the high-overlap condition. These findings provide evidence for subphonemic between-stream interactions and suggest that multiple parallel processes contribute to the irrelevant speech effect. We propose that a 2-component model, which combines the assumptions of process- and content-based accounts for the irrelevant speech effect, offers the best explanation for these findings. © 2011 American Psychological Association.

Publication Date

3-1-2012

Publication Title

Journal of Experimental Psychology: Learning Memory and Cognition

ISSN

02787393

Volume

38

Issue

2

First Page

473

Last Page

481

PubMed ID

21928935

Digital Object Identifier (DOI)

10.1037/a0025368

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