Experimental DesignDifficulty 2/5
A behavior analyst has taught a client to tie their shoes and wants to demonstrate experimental control. Why is a reversal design inappropriate?
- AReversal designs cannot be used with children because withdrawal is always unethical
- BThe behavior must be dangerous before a reversal design can be justified
- CReversal designs require at least three participants to replicate the effect
- DThe skill is irreversible, so withdrawing teaching will not return responding to baseline
Show answer and rationale
Correct: D. Reversal logic depends on behavior returning to baseline levels when treatment is withdrawn. Acquired skills do not reverse, so verification is impossible. A multiple baseline across behaviors or participants is the appropriate alternative.
- C — Reversal designs are within-subject and need only one participant.
- A — Age is not the constraint.
- B — Danger is a reason to avoid reversal, not a requirement for it.