One Concern of Researchers When Testing Children's Reactions in an Unfamiliar

Multiple Choice

One concern of researchers when testing children's reactions in an unfamiliar experimental situation is that:

A) it is usually not ethical to experiment with children.
B) children do not enjoy participating in experiments.
C) children may expect to get rewards and be disappointed when they do not.
D) the children may react differently from the way they typically would behave.