Ranzini Mariagrazia, Girelli Luisa
University of Padova, Padua, Italy.
Atten Percept Psychophys. 2012 Jul;74(5):1001-8. doi: 10.3758/s13414-012-0302-3.
Recent studies have suggested that numerical and physical magnitudes are similarly processed by a generalized magnitude system. The present study investigates the number-luminance interaction, taking advantage of illusory effects in a cued line bisection task with numerical or nonnumerical flankers and varying levels of luminance. The results showed that both dimensions influenced bisection performance. Whereas numbers (Experiment 1) induced a systematic shift of the subjective midpoint toward the larger digit, luminance (Experiment 2) modulated the bisection performance toward the darker flanker. By combining these two illusions (Experiments 3 and 4), the two dimensions interfered with each other. This pattern of results suggests overlapping representations for physical and numerical magnitudes and highlights the value of illusory effects in cognitive research.
最近的研究表明，数字大小和物理量大小由一个广义的量值系统进行类似的处理。本研究利用数字或非数字侧翼刺激以及不同亮度水平下线索化线段二等分任务中的错觉效应，来探究数字-亮度交互作用。结果表明，这两个维度都影响二等分表现。数字（实验1）会使主观中点系统地向较大数字偏移，而亮度（实验2）则将二等分表现调节至朝向较暗的侧翼刺激。通过结合这两种错觉（实验3和实验4），这两个维度相互干扰。这种结果模式表明物理量大小和数字大小存在重叠表征，并突出了错觉效应在认知研究中的价值。
