舌切除者の異常音声を利用した単語知覚の研究: 第2報　単語知覚に及ぼす要因と影響

摘要

The structure of the word perception was examined by using the abnormal speech sounds of a glossectomized patient case. The impact of influence that the percent correct of mora exerted on the percent correct of word was large in the order of the first mora > the second mora > the third mora > the fourth mora. The impact of influence of the first mora was large in the order of two morae word > three morae word > four morae word. Restoration rate of syllabic disorder in the ending of a word is higher than that of the first mora. The longer the word length was, the higher restoration rate of syllabic disorder was. 36% of the words was influenced by the top-down process. The effect of the top-down process accounted for about 64% of changes of the percent correct of word. It was presumed that contribution by coarticulation information accounted for about 22% of the change of the correct word rate of the nonsense word.%舌切除患者1症例の異常音声を利用して，単語の知覚構造について調べた。モーラ正聴率が単語正聴率に及ぼす影響力は第1モーラ＞第2モーラ＞第3モーラ＞第4モーラの順に大きかった。語頭モーラの影響力は2モーラ語＞3モーラ語＞4モーラ語の順に大きかった。音節欠陥修復率は語尾の方が語頭より高い。単語長が長いほど音節欠陥修復率が高い。トップダウン処理によって，単語の36％が影響を受けた。トップダウン処理効果が単語正聴率の変動分のうちの約64％を占めた。無意味語の単語正聴率の変動のうち，約22％が調音結合情報による寄与と推定された。