How Does the A-B-A-B Design Differ from the A-B-A Design

question 120

Multiple Choice

How does the A-B-A-B design differ from the A-B-A design?

• A) There are baseline observations in the A-B-A-B design and there are no baseline observations in the A-B-A design.
• B) A treatment is administered in the A-B-A-B design and no treatment is administered in the A-B-A design.
• C) The treatment is removed in the A-B-A-B design and the treatment is not removed in the A-B-A design.
• D) The treatment is reintroduced (after having been removed) in the A-B-A-B design and the treatment is never reintroduced in the A-B-A design.

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Definitions:

PLC Input

An input signal or data received by a Programmable Logic Controller, used to control or monitor machine operations.

Resistance Temperature Detectors

Sensors that measure temperature by correlating the resistance of the RTD element with temperature.

Thermocouples

Sensing devices used to measure temperature, consisting of two dissimilar metal wires joined at one end, producing a voltage proportional to temperature difference.

Reed Relay

A type of relay that uses a pair of magnetic reeds as the switching mechanism, often enclosed in a glass tube to protect against external magnetic fields and contaminants.