What Is the Biggest Drawback to the A-B-A Design

question 4

Multiple Choice

What is the biggest drawback to the A-B-A design?

• A) There is no baseline observation period.
• B) The treatment is not withdrawn, so the experiment is open to several possible confounds.
• C) The experiment ends during a period in which the treatment has been withdrawn, which may not be beneficial for the participant.
• D) The lack of a control group means that the experiment is open to several possible confounds.

---

Definitions:

Actuator

A device that produces mechanical motion in response to an electrical, air, or hydraulic signal.

Pilot Operated

A system or valve controlled indirectly through the use of a smaller, pilot valve rather than directly by mechanical means.

Flow Control

The regulation and management of the rate or volume of flow in a system, such as fluids in pipelines or data over networks, to meet certain conditions or requirements.

Directional Control

The mechanism or system used to steer or change the direction of a vehicle or a machine part.