Neurobehavioral Unit, Kennedy Krieger Institute, 707 N. Broadway, Baltimore, Maryland 21205, USA.
J Appl Behav Anal. 2009 Fall;42(3):729-33. doi: 10.1901/jaba.2009.42-729.
The current study examined whether stimuli of different preference levels would be associated with different amounts of work maintained by the stimuli, as determined through progressive-ratio schedule break points. Using a paired-choice preference assessment, stimuli were classified as high, moderate, or low preference for 4 individuals with developmental disabilities. The stimuli were then tested three times each using a progressive-ratio schedule (step size of 1; the break-point criterion was 1 min). In 10 of 12 possible comparisons, higher preference stimuli produced larger break points than did lower preference stimuli.
本研究考察了不同偏好水平的刺激物是否与通过递增比率时间表断点确定的不同刺激物维持的工作量有关。通过配对选择偏好评估，将 4 名发育障碍个体的刺激物分为高、中、低偏好。然后，使用递增比率时间表（步长为 1；断点标准为 1 分钟）对每个刺激物进行了三次测试。在 12 次可能的比较中有 10 次，较高偏好的刺激物产生的断点大于较低偏好的刺激物。
