Arp Sandrine, Fagard Jacqueline
Laboratoire Cognition et Développement, CNRS, UMR-8605, 71 avenue Edouard Vaillant, F-92774 Boulogne-Billancourt Cedex, France.
Dev Psychobiol. 2005 Jul;47(1):89-102. doi: 10.1002/dev.20069.
The goal of this study was to investigate the factors responsible for the low subitizing limit of cerebral palsied (CP) children. For this purpose, 44 CPs were tested on two tasks involving the rapid recognition of dot configurations. The answer was either a number (subitizing task) or the name of a pattern (pattern recognition task). The CPs were compared to controls of the same age. All children were evaluated for visual and visuospatial short-term memory. The results showed that CPs with a low subitizing limit did not do better with a canonical arrangement than the random one, were impaired to the same extent on the pattern recognition task as on the subitizing task, and had a short visuospatial short-term memory span. These results suggest that the low subitizing limit of CPs stems from a (non-number-dependent) lesser capacity to perceive a dot configuration as a gestalt. A low subitizing limit was almost always associated with a right-hemisphere lesion.
本研究的目的是调查导致脑瘫（CP）儿童低数感极限的因素。为此，对44名脑瘫儿童进行了两项涉及快速识别点阵构型的任务测试。答案要么是一个数字（数感任务），要么是一种图案的名称（图案识别任务）。将脑瘫儿童与同龄对照组进行比较。对所有儿童进行了视觉和视觉空间短期记忆评估。结果表明，数感极限低的脑瘫儿童在规范排列下并不比随机排列表现更好，在图案识别任务中的受损程度与数感任务相同，且视觉空间短期记忆跨度较短。这些结果表明，脑瘫儿童的低数感极限源于将点阵构型视为一个整体的（与数字无关的）能力较弱。低数感极限几乎总是与右半球病变相关。
