The effect of acoustic feedback in an auditory Posner paradigm: delay effect and bias in ERP

A 'delay effect' occurs when a subect hears the sound of his own voice that is delayed by few milliseconds. This abnormal feedback induces difficulties in the articulation of language. This study aims to investigate ERP modulation during an auditory Posner paradigm an auditory delay effect (DAF) training. Main ERPs results highlighted delayed latencies and greater amplitudes after DAF This can indicate how auditory feedback systems affect motor and auditory attentional early processes, by altering not only the task itself in language performance, but also producing a delayed bias in ERP components. So, if the acoustic feedback is naturally presented without delayed latency (NDAF), subjects will have no difflculty in producing verbal language and no ERP bias. If the stimulus is presented as DAF, subjects will present difficulties in articulating language, and will show ERP bias, in particular in frontoparietal in temporoparietal and in parietal ROt This highlights the momentary interruption of an automatic process.