Researchers investigated whether therapeutic horseback riding would decrease off-task behavior in a group of five adolescents with ASD. Each student has a therapeutic horseback riding session every day. They are then asked to complete brief academic task where off-task behavior is measured. What research design methodology should be used?

Group of answer choices

Single case research design would be appropriate.

Group research design would be appropriate.

Either group research design or single case research design could be appropriate.

None of these are appropriate.