Effects of speaker familiarity and laboratory training on

• Main Authors: Huang, Kuo-You, 黃國祐
• Other Authors: Tseng Chin-Shing, Chen I-Ping
• Format: Others
• Language: zh-TW
• Published: 1998
• Online Access: http://ndltd.ncl.edu.tw/handle/90859561528069623787

博士 === 國立中正大學 === 心理學研究所 === 86 === It is well known that dysarthric speech is often more intelligible to listeners familiar with the speaker than to those who are not. The underlying mechanisms for this speaker familiarity effect, however, are not fully understood. In this study, two experiments were conductedto investigate effects of speaker familiarity and laboratory training onperception of dysarthric speech. In the first experiment, a Chinese- speakingwoman with cerebral palsy produced lists of bisyllabic words, bisyllabic pseudowords and isolated monosyllables. Familiar listeners (the speaker''s parents and brothers) and naive listeners listened to and transcribed theseitems. The results indicated that familiar listeners yielded substantiallyhigher intelligibility scores than naive listeners and that the effect was more pronounced for meaningful words than isolated syllables and pseudowords.It was shown that familiarity effect resulted from the interaction betweenspeech decoding and word knowledge. Error analyses and acoustic measurementsshowed that familiar listeners could use the acoustic information available to identify stops and affricates. In the second experiment, an intensivelaboratory training was carried out to discover the dynamics of the familiarity effect. In Exp2A, feedbacks about the target words were or werenot given to the listeners. In Exp2B, a forced-choice paradigm was appliedin training task, and confusability among syllable pairs was manipulatedso that top-down and bottom-up influences could be differently observedduring the training course. The results indicated that laboratory trainingwas effective and it can in fact mimic the development of the familiarityeffect in the naturalistic environment.