ABSTRACT
Herrnstein and Loveland used a straightforward concept-training procedure. They projected a variety of pictures (one at a time) on a viewing screen in the pigeon’s Skinner box. Notice that the definition of concept training is identical to that of stimulus discrimination training, except for one word: Concept training deals with stimulus classes, whereas discrimination training deals with individual stimuli. To understand the fading procedure, the people first need to understand the concept of stimulus dimensions-the characteristics of stimuli. And periodically they review their many training procedures in their autism centers to make sure they are not blowing the Gina Green Principle.
