| Summary: | 碩士 === 國立臺灣師範大學 === 英語研究所 === 88 === ABSTRACT
The objective of the present study is twofold. First, we wonder whether the nasal consonant and the formant transition provide sufficient nasality information for nasality judgment. Second, we wonder whether the nasal consonant and the formant transition form a robust nasality cue.
Two perceptual experiments were thus conducted. The former was a gating experiment. The latter was a cue-conflicting experiment. In the gating experiment, the CV syllables were edited into three forms: the consonant, the consonant plus the formant transition, and the complete syllable. Then stimuli were submitted to subjects for nasality judgment. In the cue-conflicting experiment, two alternatives (oral/nasal) for each part (the consonant, the transition, and the steady-state portion) made eight possible forms. Stimuli were also submitted to subjects for nasality judgment.
Results showed that over half of the nasal stimuli were totally accepted when the nasal consonant and the transition together were provided. Besides, over ninety per cent of stimuli were identified as nasal in the same condition. In the perception of nasality inconsistent syllables, the NNO syllables elicited the most nasal responses. With more than two-thirds of the syllable was occupied by orality, sixty-four per cent of the stimuli were identified as nasal. This implied that the nasal consonant and the nasal formant transition could be a robust nasality cue. Regarding the respective contributions, the effect of the consonant failed to work unless something nasal followed. The effect of the formant transition failed to work unless it was preceded by a nasal consonant, and the effect of the steady-state portion worked in any context.
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