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Multiple spatial representations of number: evidence for co-existing compressive and linear scales

机译:数字的多个空间表示:共存压缩和线性尺度的证据

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摘要

Although the spatial representation of number (mental number line) is well documented, the scaling associated with this representation is less clear. Sometimes people appear to rely on compressive scaling, and sometimes on linear scaling. Here we provide evidence for both compressive and linear representations on the same numerical bisection task, in which adult participants estimate (without calculating) the midpoint between two numbers. The same leftward bias (pseudoneglect) shown on physical line bisection appears on this task, and was previously shown to increase with the magnitude of bisected numbers, consistent with compressive scaling (Longo and Lourenco in Neuropsychologia 45:1400–1407, 2007). In the present study, participants held either small (1–9) or large (101–109) number primes in memory during bisection. When participants remembered small primes, bisection responses were consistent with compressive scaling. However, when they remembered large primes, responses were more consistent with linear scaling. These results show that compressive and linear representations may be accessed flexibly on the same task, depending on the numerical\udcontext.
机译:尽管数字(心理数字线)的空间表示形式已得到充分记录,但与此表示形式相关的缩放比例却不太清楚。有时人们似乎依赖压缩比例,有时甚至依赖线性比例。在这里,我们为同一数字二等分任务提供了压缩和线性表示的证据,其中成年参与者估计(而不计算)两个数字之间的中点。物理线平分线上显示的向左偏斜(假齿骨偏斜)也出现在此任务上,以前被证明会随着被二等分的数量的增加而增加,与压缩比例一致(Longo和Lourenco在Neuropsychologia 45:1400-1407,2007)。在本研究中,参与者在对分期间记忆中的素数较小(1–9)或较大(101–109)。当参与者记住小的素数时,两等分反应与压缩比例一致。但是,当他们记住较大的素数时,响应与线性比例更一致。这些结果表明,可以根据数字\ udcontext灵活地在同一任务上访问压缩表示形式和线性表示形式。

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