Grimm Sabine, Schröger Erich, Bendixen Alexandra, Bäss Pamela, Roye Anja, Deouell Leon Y
Institute of Psychology I, University of Leipzig, Seeburgstr. 14-20, 04103 Leipzig, Germany.
Clin Neurophysiol. 2008 Apr;119(4):934-47. doi: 10.1016/j.clinph.2007.12.011. Epub 2008 Mar 4.
The present study aimed at adapting a multi-deviant auditory distraction paradigm for a comprehensive screening of functions of voluntary and involuntary auditory attention.
Subjects performed phonetic discrimination on lateralized consonant-vowel syllables in a distraction paradigm in which task-irrelevant deviances occurred on different syllable features. Behavioral performance and event-related potentials (ERPs) were measured within a multi-deviant (frequency, location, and duration deviants, p=0.11 each) and a classic single-deviant design (frequency deviants only, p=0.11). Additionally, ERP effects obtained in an active and a passive multi-deviant condition were compared.
Behavioral and electrophysiological deviance-related effects were rather similar in the multi-deviant and the single-deviant paradigm. Furthermore, the comparison to the passive listening condition revealed a marked effect of voluntary attention on sensory processing of the syllables.
The multi-deviant distraction paradigm provides a gain in time compared to the classic single-deviant distraction paradigm which is not accompanied by a loss in the strength of the effects. Inclusion of a passive listening condition enables the additional evaluation of effects of voluntary attention.
The present multi-deviant distraction paradigm creates an important step towards a tool suited to investigate involuntary and voluntary attention in selected groups of patients during the processing of task-relevant and task-irrelevant auditory information across different acoustic dimensions.
本研究旨在采用一种多偏差听觉分心范式，以全面筛查自愿性和非自愿性听觉注意力的功能。
受试者在分心范式下对侧化的辅音-元音音节进行语音辨别，其中任务无关的偏差出现在不同的音节特征上。在多偏差（频率、位置和持续时间偏差，每种偏差概率均为0.11）和经典单偏差设计（仅频率偏差，概率为0.11）中测量行为表现和事件相关电位（ERP）。此外，还比较了主动和被动多偏差条件下获得的ERP效应。
多偏差范式和单偏差范式中与偏差相关的行为和电生理效应相当相似。此外，与被动聆听条件的比较显示，自愿注意力对音节的感觉处理有显著影响。
与经典单偏差分心范式相比，多偏差分心范式在时间上有所增益，且不会伴随效应强度的损失。纳入被动聆听条件能够额外评估自愿注意力的效应。
目前的多偏差分心范式朝着一种工具迈出了重要一步，该工具适合在处理不同声学维度的任务相关和任务无关听觉信息时，研究特定患者群体中的非自愿和自愿注意力。
