| Objects: In order to explore the SNARC effect and its essence further,we research the influence of SNARC effect from the physical representation(non-response hand position)and different spatial representation of spatial reference,through the reaction with one finger,and discuss the brain mechanisms of number-spatial association to explore the nature of the SNARC effect.Methods: In the first experiment,the effect of body representation(the position of the non-reactive hand)on SNARC effect was investigated.The second experiment ask participants to use right index finger to button the keyboard,researching the individual's own space representation and the space representation mode based on object space to make two different influence on SNARC effect.At the same time,the ERP technology was used to research the brain mechanisms of different reference frame and digital processing of the spatial representation,to explore the inner link of digital processing and spatial representation.Results: In the first experiment,significant SNARC effect was observed in the reaction mode of one hand with one finger.The result shows that the processing of spatial information of left and right appears in the response mode of keystroke with one hand and one finger.In addition,the main effect of the position of the non-reactive hand was also significant,indicating that the different position of the non-reactive hand would affect the SNARC effect.The results of experiment 2 showed that both in the form of spatial representation based on oneself and the form of spatial representation based on the object,the keystroke response that met the SNARC effect condition was faster than that that did not meet the condition.The response time based on the spatial representation by oneself is significantly higher than that based on the spatial representation of the object.The ERP results showed that the spatial representations of different reference systems were significantly different in P3 components,but not in LPP components,indicating that the spatial representations of different reference systems were not significantly different in later processing.According to the analysis of variance of wave amplitude in different brain regions,the brain region that plays an important role in spatial recognition is the parietal lobe.Conclusion :(1)Numerical processing is associated with spatial information processing,and spatial information processing is affected by body effectors.(2)The brain region that plays an important role in spatial recognition is the parietal lobe,which shows unilateral dominance in the processing process.In particular,the left parietal lobe plays an important role in the processing of larger numbers,and the incubation period is short.The right parietal lobe plays an important role in the processing of smaller numbers,and the incubation period is longer.Spatial information processing in different reference frames is not significantly different in late components. |
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