1) A single case of design in which baseline and intervention conditions are repeated with the same person.

2) an experimental design in which behaviour is compared during baseline, during treatment, and then during a reversal to baseline.

3) An arrangement of control and experimental conditions at which one or both conditions are repeated at least once, which requires "reversing" back to a prior condition (e.g., ABAB).

4) An experimental design in which we reverse between intervention and baseline conditions to assess the effects of these conditions.

5) An experimental design in which the effects of the independent variable are tested by introducing a phase (e.g., an Alt-R or DRO treatment phase) in which the direction of the change reverses (i.e., reinforcement of being out-of-seat instead of in-seat).