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KMID : 1036820190240030735
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Communication Sciences & Disorders
2019 Volume.24 No. 3 p.735 ~ p.748
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Influence of Retrieval Distractor and Sequencing Distractor on Phonological Encoding Performance in Children with and without Speech Sound Disorders
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Hwang Ji-Hye
Ha Ji-Wan
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Abstract
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Objectives: We investigated the phonological encoding performance of children with and without speech sound disorders (SSD) using a priming task composed of a retrieval distractor and a sequencing distractor.
Methods: The subjects were children with SSD, children with SSD with language delay (SSD+LD), and typically developing children (TD) aged 4?5 years. A picture was given with distractor, in which children should ignore the distractor and name the picture. The three kinds of distractors (retrieval, sequencing, and unrelated distractor) were presented auditorily at each of three stimulus onset asynchrony (SOAs; -300 ms, 0 ms, +300 ms).
Results: Both the pure SSD and the SSD+LD groups showed significant difference in accuracy, and the SSD+LD group showed significant difference in reaction time and error rate compared with the TD group. Both retrieval and sequencing distractors significantly improved the task performance when compared to the unrelated distractor. The retrieval distractor promoted the performance in all SOAs, whereas the sequencing distractor promoted subjects’ performance only in SOA 0 ms. With the unrelated distractor, phonological inactivation errors were significantly more frequent. However, phonation activation errors were significantly more frequent in both retrieval and sequencing distractors.
Conclusion: The SSD group, in particular the SSD+LD group, may be more sensitive to distractors than the TD group. However, depending on the type of distractors, a positive priming effect may be expected, and the effect may vary depending on the point of presentation of distractors.
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KEYWORD
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Speech sound disorder, Phonological encoding, Priming effect, Retrieval distractor, Sequencing distractor
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