If you were designing a multiple-baseline study across participants to test a new therapy for anxiety in four patients, how would you schedule the introduction of the therapy for each patient to maximize internal validity? Provide a brief one- to three-sentence answer.
Question: If you were designing a multiple-baseline study across participants to test a new therapy for anxiety in four patients, how would you schedule the introduction of the therapy for each patient to maximize internal validity? Provide a brief one- to three-sentence answer.
Sample answer: I would establish an initial baseline for anxiety in all four patients simultaneously. Then, I would introduce the therapy to the first patient while continuing baseline measurements for the other three, staggering the introduction for the remaining patients at predetermined intervals one after the other.
Key points:
- Establish concurrent baselines for all patients
- Stagger the start time of the therapy
- Implement the therapy for one patient at a time
Rubric: Full credit is given if the student explicitly describes staggering the introduction of the treatment across the four patients after a shared baseline period.
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Research Methods in Psychology - 4th American Edition @ KPU
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