SNARC and SNAAC: spatial-numeric association of response codes and attentional cuing

EEG;SNARC effect;Cuing

Broadway, James Michael ; Psychology

University:Georgia Institute of Technology

Department:Psychology

关键词: EEG;    SNARC effect;    Cuing;   

Others  :  https://smartech.gatech.edu/bitstream/1853/44708/1/broadway_james_m_201208_phd.pdf

美国|英语

来源: SMARTech Repository

【 摘 要 】

Two event-related potential (ERP) experiments were conducted to investigate spatial-numeric associations of response codes (SNARC) and attentional cuing (SNAAC).In the SNARC effect, people respond faster when making a left-hand response to report that a number is small, and when making a right-hand response to report that a number is large.Experiment 1 examined effects of SNARC-compatibility and prior response-probability in a number comparison task.Lateralized readiness potentials (LRPs) showed that SNARC-compatibility influenced an intermediate stage of response-selection, and prior response-probability influenced both earlier and later stages.The P300 ERP component was also modulated by SNARC-compatibility and prior response-probability, suggesting parietal involvement in the SNARC effect.In the SNAAC effect, attention is directed to left-side regions of space upon viewing small-magnitude numbers, and to right-side regions of space upon viewing large-magnitude numbers.Experiment 2 investigated whether ERPs evoked by peripheral visual probes would be enhanced when probes appeared in the left hemifield after small-magnitude digits and when they appeared in the right hemifield after large-magnitude digits.ERPs to peripheral probes were not modulated by numerical magnitude of digit pre-cues.