In the changing criterion design single case experiment, the researcher
A) implements two or more treatments during a single treatment session, each during its own time period.
B) sets increasingly stringent criteria for the dependent variable to reach as an indicator of treatment effectiveness.
C) assesses multiple dependent variables with each dependent variable having a baseline of a different length.
D) adds an additional control condition that can rule out alternative explanations for the effect of the independent variable.

Question

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In a changing criterion design, the researcher sets increasingly stringent criteria for the dependent variable to reach as an indicator of treatment effectiveness. This is done in order to demonstrate that any observed changes in the dependent variable are truly due to the intervention being tested, rather than other factors.

In the Changing Criterion Design Single Case Experiment, the Researcher