Card 27 / 54: At the conference, Professor Zoltan Karpathy, another psychologist, points out what he claims is a serious problem with Sam's experiment. He notices that Sam always knew whether a participant was in Group A or whether they were in Group B) Prof. Karpathy claims that Sam's data might be contaminated because of:
A) Random assignment of participants
B) Participants' response bias
C) Experimenter expectancy effects
D) Sam's sampling bias

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