Looking at the figure below, and assuming that extraneous variables uniquely present during the experimental condition have had the opportunity to influence other behavior, what requirement has not been met to qualify this as a multiple baseline design?

A) The period of overlap between the experimental condition and the second baseline must be sufficient to permit the response class under the control condition to be influenced by any variables that may do so
B) Each baseline must be independent
C) The experimental condition must contact the second baseline as a test of its sensitivity
D) When the intervention is ongoing in one baseline, the control condition must be ongoing in the other baseline used for comparison

Question

Looking at the figure below, and assuming that extraneous variables uniquely present during the experimental condition have had the opportunity to influence other behavior, what requirement has not been met to qualify this as a multiple baseline design?

A) The period of overlap between the experimental condition and the second baseline must be sufficient to permit the response class under the control condition to be influenced by any variables that may do so 
B) Each baseline must be independent 
C) The experimental condition must contact the second baseline as a test of its sensitivity 
D) When the intervention is ongoing in one baseline, the control condition must be ongoing in the other baseline used for comparison

Quizplus · Accepted Answer

The requirement that has not been met is that the period of overlap between the experimental condition and the second baseline must be sufficient to permit the response class under the control condition to be influenced by any variables that may do so. This means that the second baseline needs to be long enough so that any variables that may have influenced behavior during the experimental condition have a chance to influence behavior during the second baseline. In the figure, the period of overlap between the experimental condition and the second baseline is not sufficient as it is too short.

Looking at the Figure Below, and Assuming That Extraneous Variables