| Title | Effects of selective attention on ERPs elicited by visual & auditory deviant stimuli |
| Authors | Xiao, Jian Huang, Wei Wei, Jinghan |
| Issue Date | 1999 |
| Publisher | 开云app体育 学报 自然科学版 |
| Citation | Beijing Daxue Xuebao Ziran Kexue Ban/Acta Scientiarum uaturalium Universitatis Pekinensis.1999,35,(3),421-428. |
| Abstract | The effects of deviant visual and auditory stimuli on event-related potentials were investigated in an intermodal oddball task. Tones of different pitch were used as auditory stimuli (standard: 1000 Hz, 85%, deviant 800 Hz. 15%) and various single Chinese words and simple geometric figures were used as visual stimuli. Auditory and visual stimuli were presented sequentially to subjects at randomized ISI of 700 - 1300 ms. The subjects were instructed to attend visual channel and ignore the auditory in one block and to attend auditory and ignore visual in the other with key-responses to the current attended stimuli. Results showed the deviant auditory stimuli elicited similar mismatch negativity (MMN) in both attended and unattended conditions. MMN's independence of attention in auditory modality may reflect the automatic processing of auditory sensory inputs. In the visual modality, the deviant stimuli elicited no MMN or MMN-like component in both conditions because of the parallel processing system of visual modality and its difficulty of establishing the memory trace. The enhanced P300 elicited by the auditory and visual deviant stimuli in active condition may reflect the representation updating of work memory. The results were consistent with Naatanen's observation on MMN. |
| URI | http://hdl.handle.net/20.500.11897/408556 |
| ISSN | 0479-8023 |
| Indexed | EI |
| Appears in Collections: | 待认领 |
