What it means
Each person acts as their own control, so the design can need fewer participants. Its main risk is carry-over, where the first treatment’s effects linger into the second period. A washout period helps reduce that risk.
Many small nutrition and supplement trials use this design.
Also known as
- crossover design
- crossover study
- washout period
Sources
General information, not medical advice. Talk to a clinician about any decision about your health.