Sometimes one variable will determine only part of the subsequent response. When this occurs, that variable is called a fragmentary source of strength. Features irrelevant to the classification of fragmentary sources of strength include which types of elementary verbal relationships are involved and the response topography.
A type of stimulus control with the following features:
The response form is multiply controlled
At least one of the controlling variables strengthens only one part of the response form
Which types of elementary verbal relationships are involved
The response topography