中文摘要：

目的：考察时间压力和语音复杂性对口吃者语音编码的影响。方法：采用外显发声任务，对口吃组与对照组在有、无时间压力条件下对不同语音复杂性材料的朗读速度和口吃频率进行了考察。结果：①口吃组和对照组在有时间压力条件下朗读速度显著快于无时间压力条件，朗读绕口令句子的速度显著慢于非绕口令句子，朗读声母绕口令显著慢于韵母绕口令；②在时间压力条件下口吃频率显著高于无时间压力条件，朗读绕口令句子的口吃频率显著高于非绕121令句子，朗读声母绕口令的口吃频率显著高于韵母绕口令；③朗读声母绕口令时在句首发生1：3吃的比率显著高于韵母绕口令。结论：时间压力和语音复杂性对口吃组和对照组的语言编码和言语流畅性有重要影响。

英文摘要：

Objective： The present study intended to explore whether time pressure and phonological complexity would influence the phonological encoding of stutterers. Methods： Both persons who stutter（PWS） and persons who do not stutter （PNS） were investigated in overt speech task. Results： （1）Both PWS and PNS read faster with time pressure than without time pressure, read twisters slower than non-twisters, and read Shengmu twisters slower than Yunmu twisters. （2）The stuttering frequency with time pressure was higher than that without time pressure, the stuttering frequency of reading twisters was higher than that of reading non-twisters, and the stuttering frequency of reading Shengmu twisters was higher than that of reading Yunmu twisters. （3）The ratio of stuttering at the beginning of sentence of reading Shengmu twisters was higher than that of reading Yunmu twisters. Conclusion： Time pressure and phonological complexity influenced both PWS and PNS in the language production system.