Masin Sergio Cesare, Tommasi Marco, Da Pos Osvaldo
Department of General Psychology, University of Padua, Italy.
Percept Mot Skills. 2007 Jun;104(3 Pt 2):1367-74. doi: 10.2466/pms.104.4.1367-1374.
A new model of achromatic transparency has been recently proposed by Singh and Anderson as an alternative to the model proposed long ago by Metelli. The study reported here compared these models using achromatic stimuli consisting of a transparent disk on a background formed by two adjoining rectangles, with the common border of the rectangles dividing the disk in half. Let a and b denote the luminances of the left and right parts of the background, respectively, and let p and q denote the luminances of the left and right parts of the disk, respectively. The value of b was varied for fixed values of a, p, and q. For these values the Singh-Anderson model predicts that the perceived extent of transparency T of the disk is constant with b, while Metelli's model predicts that T decreases as b increases. Participants rated T. The results confirm the prediction of Metelli's model. It is also shown that the Singh-Anderson model is invalid in principle in that, unlike Metelli's model, it fails to capture the principle of independence of the effects of a, b, p, and q on T.
辛格和安德森最近提出了一种新的消色差透明度模型，作为对梅泰利很久以前提出的模型的替代。本文报道的研究使用由两个相邻矩形组成的背景上的透明圆盘构成的消色差刺激来比较这些模型，矩形的公共边界将圆盘分成两半。分别用a和b表示背景左右部分的亮度，分别用p和q表示圆盘左右部分的亮度。对于固定的a、p和q值，改变b的值。对于这些值，辛格 - 安德森模型预测圆盘的感知透明度T随b保持不变，而梅泰利模型预测T随b增加而降低。参与者对T进行评分。结果证实了梅泰利模型的预测。还表明，辛格 - 安德森模型原则上是无效的，因为与梅泰利模型不同，它未能捕捉a、b、p和q对T的影响的独立性原则。
