| Mismatched negative wave(MMN)is widely used in the study of auditory stimulation processing because of its sensitivity to auditory changes.Usually,the oddball paradigm task is used to detect the mismatched negative wave,and the amplitude of the mismatched negative wave is measured by subtracting the difference between the amplitude caused by the deviation of the tone of the stimulus and the amplitude caused by the standard tone of the stimulus.Some previous studies have shown that the amplitude of mismatched negative waves of auditory stimuli can be reduced by cross-modal tasks of difficult visual tasks presented at the same time,reflecting the adjustment of visual task difficulty to the level of attention.However,some studies have not replicated this effect,and it is not clear whether the difficulty of the visual task presented at the same time will have an impact on the mismatched negative amplitude of the abstract feature auditory stimulus.In order to study whether the difficulty of visual task will affect the negative wave of auditory mismatch of abstract features,and whether this effect will be regulated by working memory,two EEG(ERP)experiments were conducted in this study.The visual tasks in the experiment control the level of difficulty load(high load,low load),and the distinction of difficulty of visual tasks is effective.The auditory stimulation uses the auditory frequency sound pairs of abstract features,and explore whether the difficulty of visual tasks will affect the mismatched negative waves of the auditory stimulation of abstract features(Experiment 1);Secondly,the working memory ability of the subjects was evaluated to check its regulatory effect(Experiment 2).To sum up,this study aims to prove whether the visual perception load has an impact on the auditory mismatch negative wave in an abstract feature auditory frequency mismatch negative wave study,and whether this impact will be regulated by the working memory capacity. |
PDF Full Text Request