Graff Richard B, Gibson Lenwood
New England Center for Children, 33 Turnpike Road, Southboro, MA 01772, USA.
Behav Modif. 2003 Sep;27(4):470-83. doi: 10.1177/0145445503255602.
Tangible preference assessments were compared with pictorial preference assessments for 4 individuals with developmental disabilities. In the tangible assessment, on each trial two stimuli were selected and placed in front of the participant, who approached one. In the pictorial assessment, on each trial two line drawings were placed in front of the participant, who pointed to one. For both assessments, the percentage of opportunities each stimulus was approached or touched was calculated, and hierarchies of preferred items were developed. The two assessments yielded similar preference hierarchies for 3 of 4 participants. Reinforcer assessments using a simple free operant response confirmed that items identified as highly preferred on tangible and pictorial assessments functioned as reinforcers.
对4名发育障碍患者的实物偏好评估与图片偏好评估进行了比较。在实物评估中，每次试验选择两种刺激物并放置在参与者面前，参与者接近其中一个。在图片评估中，每次试验在参与者面前放置两张线条画，参与者指向其中一张。对于这两种评估，计算每种刺激物被接近或触摸的机会百分比，并建立偏好项目的等级。对于4名参与者中的3名，两种评估产生了相似的偏好等级。使用简单的自由操作反应进行的强化物评估证实，在实物和图片评估中被确定为高度偏好的项目起到了强化物的作用。
