Dr Barber Is Conducting a Study on the Effects of Touch

Multiple Choice

Dr. Barber is conducting a study on the effects of touch on positive responses. She arranges for servers to touch their customers on the arm 0, 2, or 4 times. She then measured the amount of tips given by customer. The control group in this study was

A) those who were not touched.
B) those who were touched twice.
C) those who were touched four times.
D) those who were touched 0, 2, or 4 times.
E) those who were touched either 2 or 4 times.