A researcher is studying the effects of room temperature on ability to quickly solve math problems. She first has participants solve 10 math problems in a room with the temperature set at 70 degrees Fahrenheit. Then she has the same participants solve 10 new math problems with the room temperature set at 90 degrees. In this case, the group of participants is serving as its own
a. experimental group.
b. control group.
c. extraneous group.
d. operational group.
B
Psychology
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