Dolores de Hevia Maria, Girelli Luisa, Vallar Giuseppe
Dipartimento di Psicologia, Universitá degli Studi Milano-Bicocca, Edificio U6 Piazza dell'Ateneo Nuovo, 1, 20126, Milano, Italy.
Exp Brain Res. 2006 Jan;168(1-2):254-64. doi: 10.1007/s00221-005-0084-0. Epub 2005 Jul 26.
This study investigated the relationships between numerical and spatial representations by means of a bisection task, exploring the view that the core representation of number meaning is spatially organized as a mental number line. In Experiment nos. 1 (bisection of digit strings) and 2 (bisection of flanked lines) spatial biases towards the larger digit were found to be related only to processing of relative magnitude. Experiment nos. 3 (bisection of an unfilled space) and 4 (bisection of flanked lines/unfilled spaces) aimed at disclosing perceptual, attentional, and numerical constraints on the bias induced by the position of the larger digit. This effect is interpreted in terms of a cognitive illusion of length, whereby a spatial bias compensates for the numerical disparity. This seems to operate in a categorical fashion ("small/large"), and to be congruent with the assumption that relatively large numbers are associated with the right side of a mental representational space.
本研究通过平分任务调查了数字表征与空间表征之间的关系，探讨了数字意义的核心表征在空间上组织为心理数字线的观点。在实验1（数字串的平分）和实验2（带侧翼线的平分）中，发现朝向较大数字的空间偏差仅与相对大小的处理有关。实验3（空白空间的平分）和实验4（带侧翼线/空白空间的平分）旨在揭示较大数字位置所引起的偏差的感知、注意和数字限制。这种效应被解释为长度的认知错觉，即空间偏差补偿数字差异。这似乎以一种分类方式（“小/大”）起作用，并且与相对较大数字与心理表征空间右侧相关联的假设一致。
