The phonological similarity effect on memory span in children: Does it depend on age,speech rate,and articulatory suppression?

Abstract

The present paper addresses issues surrounding the role of rehearsal and developmental increases in rehearsal speed regarding the phonological similarity effect (PSE) on immediate serial recall performance. In two experiments, school-aged children had to recall serially phonological similar and dissimilar words with or without concurrent articulation. Speech rate of the word material was also assessed. The size of the PSE was found to be independent of both age and speech rate. Furthermore, the size of the PSE was lower under articulatory suppression as compared to a standard condition without suppression. These results are consistent with the view that the PSE emerges because confusion during redintegration of degrading short-term codes is more likely for phonological similar items than for phonological distinct items. The occurrence of the PSE seems to be independent of rehearsal although articulatory suppression can moderate the size of the PSE. The parts of the redintegration mechanism that are responsible for the PSE seem to be age-invariant between 7 and 13 years.

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