University of Denver.
J Appl Behav Anal. 1971 Spring;4(1):23-36. doi: 10.1901/jaba.1971.4-23.
The present experiment sought to develop a reliable procedure for measuring visual acuity in non-verbal retarded children. Five non-verbal retarded children and two literate adults were examined. The two adults were included in the experiment so that verbal communication with them could validate certain assumptions regarding the experimental procedures. By utilizing a lever press as the criterion response signifying a visual discrimination and employing the Snellen "E" discriminanda, a reliable subjective measure was obtained, not unlike those measures taken from verbal adults. Contrary to several antecedent procedures, a relatively precise measurement of subjective acuity was shown to be obtainable from non-verbal retarded children. Additionally, the procedure was successful in evaluating the effectiveness of prosthetic lenses previously prescribed for two of the children.
本实验旨在为非言语智障儿童开发一种可靠的视力测量程序。我们对五名非言语智障儿童和两名有读写能力的成年人进行了测试。之所以让这两名成年人参与实验，是因为可以通过与他们进行言语交流来验证有关实验程序的某些假设。通过使用杠杆按压作为表示视觉辨别力的标准反应，并采用斯涅伦“E”视标，我们获得了一种可靠的主观测量方法，与来自言语成年人的测量方法类似。与之前的几种程序不同，该方法可从非言语智障儿童身上获得相对精确的主观视力测量值。此外，该程序成功评估了之前为其中两名儿童开的两个视力矫正镜的有效性。
