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KMID : 1036820150200020145
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Communication Sciences & Disorders
2015 Volume.20 No. 2 p.145 ~ p.156
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Final Stop Consonant Perception in Children with Speech Sound Disorders
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Won Min-Ju
Ha Seung-Hee
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Abstract
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Objectives: This study aimed to identify how children with speech sound disorders (SSD) perceive final stop consonants by using a gating task in comparison with age-matched typically developing children.
Methods: Fifteen children with SSD and 15 typically developing children participated in the study. Consonant-vowel-consonant (CVC) one-syllable word pairs were used as stimuli. Forty milliseconds length (-40 ms) and sixty milliseconds length (-60 ms) from the entire duration of the final consonant were deleted for gated conditions. Three conditions (the whole word segment, -40 ms, -60 ms) were used for this speech perception experiment. In total, 48 tokens (4 stimuli×3 conditions×4 trials) were provided for the participants.
Results: When speech signals were displayed in whole-word and gated conditions in the stimuli, papㄱ-patㄱ, the perception of the children with SSD was poorer than the typically developing children. However, there was no significant difference between the children with SSD and the typically developing children in whole-word and gated conditions in stimuli mokㄱ-motㄱ, and there was no significant difference across conditions.
Conclusion: The results suggest that children with SSD have difficulty in recognizing final consonants and require more acoustic information to accurately perceive them than typically developing children. This study suggests that the difficulty of speech perception could be an associated factor of speech sound disorders.
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KEYWORD
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Speech sound disorder, Final consonants perception, Gating task, Redundancy of acoustic cue
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