口吃者加工汉语歧义短语的神经过程
摘要
<p id=C2>Prosodic boundary is an integrative part of spoken language that segments ongoing utterance into prosodic units. These boundaries are correlated with the perception of a pause, a lengthening of the pre-boundary syllable and tonal movement at the end of the phrase. Stuttering is characterized by involuntary disruptions in the flow and rhythm of speech, which was reflected by repetitions of words, sounds or syllables, prolongations and silent blocks. Behavioral response and neural processing results in the past few years indicated that adults who stutters exhibit processing differences compared with fluent speakers during syntactic, semantic and phonological (rhyme) processing. However, existing studies did not examine whether stutters encounter difficulty during perception of prosodic boundary <p id=C2>The present study aims to explore how stutters and fluent speakers process prosodic boundary of ambiguous Chinese phrases (Verb NP1 Aux NP2) in lexical and structural judgment task using ERPs. We used 168 typical ambiguous Chinese phrases as experimental materials. These phrases were temporarily ambiguous between modifier-noun construction (MNC) and narrative-object structure (NOS). Eighty-four phrases without ambiguity were used as fillers. Twenty-four (20 males) undergraduates/graduates participated in the experiment. They were told to listen carefully to pairs of phrase in two sessions with the same materials. In session one, they completed a lexical judgment task (to determine whether a visually presented word appeared in the pairs of phrase they heard), while in session two they were asked to complete a structural judgment task (to judge whether the pairs of phrase they heard belong to one kind of structure or not). Electrophysiological data were recorded by a set of 64 electrodes from eegmagine (ANT Neuro) according to the extended 10-20 positioning system. EEG data were time-locked to the offset of verb and Aux (de) of the first phrase using a 100-msec