Ittyerah Miriam, Marks Lawrence E
Centre for Development Studies, Trivandrum, Kerala, India;
Curr Psychol Lett. 2008;24(1):1-11.
A total of 60 subjects, 20 in each experimental condition, gave 'same-different' judgments to pairs of stimuli differing in radius of curvature. Stimuli were presented intramodally to vision, intramodally to haptic touch, and cross-modally to vision and haptic touch. Results showed that performance, quantified by the measure d', differed among the three modality conditions, being best in vision and poorest in haptics, with cross-modal performance falling roughly mid-way between. Unimodal visual performance exceeded cross-modal performance by about one d' unit, and cross-modal performance similarly exceeded unimodal haptic performance by about one d' unit. The study reveals the relative differences in the discrimination of curvatures of objects in vision and haptics.
共有60名受试者，每种实验条件下各20名，对曲率半径不同的刺激对进行“相同-不同”判断。刺激以视觉模态内、触觉模态内以及视觉与触觉的跨模态方式呈现。结果表明，用d'值衡量的表现，在三种模态条件下有所不同，视觉条件下最佳，触觉条件下最差，跨模态表现大致处于两者之间。单模态视觉表现比跨模态表现高出约一个d'单位，跨模态表现同样比单模态触觉表现高出约一个d'单位。该研究揭示了视觉和触觉中物体曲率辨别方面的相对差异。
