Bisiach E, Neppi-Mòdona M, Genero R, Pepi R
Dipartimento di Psicologia, Università di Torino, Turin, Italy.
Conscious Cogn. 1999 Dec;8(4):577-84. doi: 10.1006/ccog.1999.0416.
When left-neglect patients are required to extend horizontal segments to double their original length, relative left overextension is frequently observed. Less frequently, relative left underextension may also be found. It was hypothesized that this contrast could depend on the degree of horizontal anisometry of the medium for the representation of spatial properties. The present paper reports an experiment conducted in order to test that hypothesis, on the basis of which left overextension should be larger with shorter than with longer segments and with segments lying in the right rather than in the left hemispace. Although supportive, the results unveiled unexpected complications: the expected effect of line length was found only in neglect patients with frontal damage, while the expected effect of side of presentation was found only in neglect patients without frontal damage.
当要求患有左侧忽视症的患者将水平线段延长至其原始长度的两倍时，经常会观察到相对的左侧过度延长。相对较少见的是，也可能发现相对的左侧延长不足。据推测，这种差异可能取决于用于表征空间属性的媒介的水平不对称程度。本文报告了一项为检验该假设而进行的实验，基于此，较短线段的左侧过度延长应比较长线段的更大，且位于右半空间而非左半空间的线段的左侧过度延长更大。尽管结果提供了支持，但也揭示了意外的复杂情况：仅在额叶受损的忽视症患者中发现了线段长度的预期效应，而仅在无额叶受损的忽视症患者中发现了呈现侧的预期效应。
