| Summary: | 碩士 === 國立中正大學 === 語言學研究所 === 92 === In laboratory research on tonal coarticulation in Taiwanese, one study (Lin, 1988)) reported a perseveratory effect but no anticipatory effect, while another two (Peng, 1993, 1997) found a significant anticipatory effect. Peng (1993, 1997) also found tonal variation due to prosodic positions. Unlike these previous laboratory studies, this study investigates tonal coarticulation and prosodic effects in Taiwanese tones using natural conversations from the Taiwanese Spoken Corpus (Tsay and Myers, 2004), of which fifty-six minutes of recorded conversations were analyzed.
Regarding tonal coarticulation, consistent with Lin (1988), the results showed that the perseveratory effect was found in three target tones: high tone, mid tone and low tone. The effect is assimilatory in nature. A tone with high F0 raises the following tone and a tone with lower F0 lowers the following tone. The F0 range of the target tone is affected by different preceding tone. The tonal slopes of the target tone are distinct when preceded by different tones. On the other hand, the anticipatory effect was only found in mid tone. Similar to the perseveratory effect, the anticipatory effect is also assimilatory. When the following tone is with higher F0, the target tone becomes higher; when the following tone is with lower F0, the target tone becomes lower. The F0 height and slope of the target tone is also affected by the following tone. Therefore, in the case of mid tone, the tonal coarticulation is bidirectional and symmetrical.
As for prosodic effects, the results confirmed Peng (1993, 1997), showing that F0 is the lowest in utterance-final position, while in other phrase-final position it is slightly lower than in non-phrase-final position.
This study thus demonstrates the results obtained in the laboratory do indeed carry over into actual conversation.
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