Introductory Concepts
Elementary Relationships
Extensions of Verbal Behavior
Multiple Controlling Relationships
Building on the Elementary Relationships

25.4 Striking Differences in Irrelevant Features

The fewer relevant features present in a new stimulus, the less likely the response is to be emitted in the presence of that novel stimulus. Likewise, striking differences in irrelevant stimulus features, even if several relevant features are present, will result in the probability of the response being quite low.

A metaphorical cartoon of a boy conversing with a fox.

quite likely

A cartoon of a boy talking to a pink fox with striking differences.

not so likely

Stimulus Features of “Dog”



Four legs

Canine teeth





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