To experimentally test the adage "An apple a day keeps the doctor away," Anika randomly assigned 50 participants to eat an apple every day for one month and assigned 50 participants not to eat any apples during the month-long study period. At the end of the study, she asked all 100 participants how many apples they ate in a given day. This question served as her:
A) experimental hypothesis.
B) internal validity.
C) manipulation check.
D) mundane realism.

Question

Quizplus · Accepted Answer

The question asked by Anika about how many apples participants ate each day serves as a manipulation check. This is because it verifies whether the experimental manipulation (eating an apple every day vs. not eating any apples) was implemented as intended among the participants.

To Experimentally Test the Adage "An Apple a Day Keeps