Clevenger Theresa M, Graff Richard B
New England Center for Children, Southborough, Massachusetts 01772, USA.
J Appl Behav Anal. 2005 Winter;38(4):543-7. doi: 10.1901/jaba.2005.161-04.
Tangible and pictorial paired-stimulus (PPS) preference assessments were compared for 6 individuals with developmental disabilities. During tangible and PPS assessments, two edible items or photographs were presented on each trial, respectively, and approach responses were recorded. Both assessments yielded similar preference hierarchies for 3 participants who could match pictures and objects but different hierarchies for 3 participants who could not. Reinforcer assessments verified that items identified as high preference on PPS assessments functioned as reinforcers only for participants with matching skills.
对6名发育障碍个体的实物与图片配对刺激（PPS）偏好评估进行了比较。在实物和PPS评估期间，每次试验分别呈现两种可食用物品或照片，并记录趋近反应。对于3名能够匹配图片和物品的参与者，两种评估产生了相似的偏好等级，但对于3名无法匹配的参与者则产生了不同的等级。强化物评估证实，在PPS评估中被确定为高度偏好的物品仅对具有匹配技能的参与者起到强化物的作用。
