Twisting tongues to test for conflict-monitoring in speech production

被引:20
作者
Acheson, Daniel J. [1 ,2 ]
Hagoort, Peter [1 ,2 ]
机构
[1] Max Planck Inst Psycholinguist, Neurobiol Language Dept, NL-6500 AH Nijmegen, Netherlands
[2] Radboud Univ Nijmegen, Donders Inst Brain Cognit & Behav, NL-6525 ED Nijmegen, Netherlands
关键词
speech production; error-related negativity (ERN); monitoring; flanker task; ERP/EEG; cognitive control; tongue twister; N2; ANTERIOR CINGULATE CORTEX; ERROR-DETECTION; TIME-COURSE; RESPONSE-CONFLICT; PREFRONTAL CORTEX; COGNITIVE CONTROL; BRAIN POTENTIALS; NEURAL SYSTEM; INTERFERENCE; OUTPUT;
D O I
10.3389/fnhum.2014.00206
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
A number of recent studies have hypothesized that monitoring in speech production may occur via domain-general mechanisms responsible for the detection of response conflict. Outside of language, two ERR components have consistently been elicited in conflict-inducing tasks (e.g., the flanker task): the stimulus-locked N2 on correct trials, and the response-locked error-related negativity (ERN). The present investigation used these electrophysiological markers to test whether a common response conflict monitor is responsible for monitoring in speech and non-speech tasks. Electroencephalography (EEG) was recorded while participants performed a tongue twister (TT) task and a manual version of the flanker task. In the TT task, people rapidly read sequences of four nonwords arranged in TT and non-TT patterns three times. In the flanker task, people responded with a left/right button press to a center-facing arrow, and conflict was manipulated by the congruency of the flanking arrows. Behavioral results showed typical effects of both tasks, with increased error rates and slower speech onset times forTT relative to non-TT trials and for incongruent relative to congruent flanker trials. In the flanker task, stimulus-locked EEG analyses replicated previous results, with a larger N2 for incongruent relative to congruent trials, and a response-locked ERN. In the TT task, stimulus-locked analyses revealed broad, frontally-distributed differences beginning around 50 ms and lasting until just before speech initiation, with TT trials more negative than non-TT trials; response-locked analyses revealed an ERN. Correlation across these measures showed some correlations within a task, but little evidence of systematic cross-task correlation. Although the present results do not speak against conflict signals from the production system serving as cues to self-monitoring, they are not consistent with signatures of response conflict being mediated by a single, domain-general conflict monitor.
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页数:16
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