The first person to use a single-subject reversal design was probably ____________.
A) Aardvark
B) Darwin
C) Galen
D) Malthus

Name: The first person to use a single-subject reversal design was probably ____________. A) Aardvark B) Darwin C) Galen D) Malthus
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Question

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Galen, an ancient Roman physician, is believed to have been the first to use a single-subject reversal design in his medical research. He used this design to study the effects of bloodletting on human patients.

The First Person to Use a Single-Subject Reversal Design Was