正负数混合呈现对负数SNARC效应的影响

The Impact of Positive and Negative Numbers Mixed Presentation on the SNARC Effect of Negative Numbers

采用数字大小判断任务,探讨正负数混合呈现对负数SNARC效应的影响。结果发现,在负数单独呈现条件下,负数出现反转的SNARC效应;在正负数混合呈现且只对负数反应条件下,负数出现反转的SNARC效应;在正负数混合呈现且对正负数都反应条件下,负数出现反转的SNARC效应而正数没有出现SNARC效应;有无加号正数和负数混合不会影响负数的SNARC效应。说明负数空间表征受其绝对值大小的影响,绝对值较小的负数表征在心理数字线左侧,绝对值较大的负数表征在数字线右侧,且不能向心理数字线左侧延伸。

The SNARC effect(Spatial-Numerical Association of Response Codes)refers to the fact that the left hand responds to small numbers faster than the right hand,while the right hand responds to large numbers faster than the left hand.At present,most studies on the SNARC effect focus on the positive numbers,but few studies have explored the negative numbers.Therefore,there are still many problems in negative numbers which need further discussion.First,some researchers used a way of independently presented negative numbers to observe the spatial representation of negative numbers and found the inverted SNARC effect of negative numbers.However,some researchers have used a way of positive and negative numbers mixed presentation to explore the connection between negative and space,and the traditional SNARC effect of negative numbers was discovered.Did the negative numbers alone or mixed with positive numbers presented have different effects on the SNARC effect of negative numbers?Second,some researchers used a way of the positive numbers with no plus sign mixed with negative numbers,and the reversed SNARC effect of negative numbers was found.However,others have used a way of the positive numbers with plus sign mixed with negative numbers,where no SNARC effect of negative numbers was found.Did the positive numbers without plus sign and the positive numbers which had plus sign mixed with negative numbers have different effects on the SNARC effect of negative numbers?Finally,some researchers asked the participants to respond only to negative numbers under the positive numbers and negative numbers mixed conditions,and the inverted SNARC effect appeared in negative numbers.However,other researchers told the participants to respond to both positive and negative numbers,where a traditional SNARC effect of negative numbers was found.Did responding only to negative numbers and responding to both positive and negative numbers have a different effect on the SNARC effect of negative numbers?Therefore,this study uses a magnitude judgment task to investigate the effect of positive and negative numbers mixed presentation on the negative SNARC effect.The results show that under the condition where negative numbers alone are presented,the reversed SNARC effect is found;under the condition that the negative numbers mixed with the positive only react to the negative numbers,the negative numbers have the inverse SNARC effect;under the condition that the negatives numbers mixed with the positive numbers respond to both positive and negative numbers,the negative numbers have the inverted SNARC effect,while the positive numbers do not show SNARC effect;the presence or absence of a plus sign with positive mixed with negative numbers does not affect the SNARC effect of negative numbers.In general,the spatial representation of negative numbers is affected by the absolute values:the negative numbers with smaller absolute values are represented on the left side of the mental number line,while negative numbers with larger absolute values are represented on the right side of the mental number line.