Preliminary results of a stop-signal experiment
نویسنده
چکیده
This report presents a method for investigation of speech planning processes that uses a stop-signal paradigm. An experiment was conducted to investigate how produced speech rhythm and syllable stress influence the ability to halt speech in mid-utterance. Subjects produced three sentences with precisely controlled metrical patterns, and on 75% of trials were given a signal at a random time to stop speaking as quickly as possible. Stop latencies, measured by the cessation of phonation, were hypothesized to be affected by the rhythmic structure of the sentences, as well as the prominence of current and upcoming syllables. The results indicate that stop latencies are longer when speakers are signaled to stop prior to a stressed syllable; this suggests that the planning of stressed syllables involves greater activation than the planning of unstressed syllables.
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