A-B-A design

a type of single-case design having three phases: a baseline condition in which no treatment is present (Phase A), a treatment condition in which a manipulation is introduced (Phase B), and a return to the no-treatment condition (Phase A). The design allows for evaluation of the introduction of the treatment by comparing the dependent variable between the first two phases (A-B sequence) as well as evaluation of the removal of the treatment by comparing the dependent variable between the last two phases (B-A sequence). This greatly reduces the possibility of a coincidental treatment effect, which may occur in the simpler A-B design.

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Psychology term of the day

November 23rd 2024

simulator

n. a training device that simulates the conditions or environment of the actual operating situation or that resembles the actual equipment to be used, such as a flight simulator for pilots. The training allows for a safe, lower-cost experience with the conditions under study but may lack realism.