David and Val both take part in a research study that is investigating the effects of sleep deprivation on reaction time. David is kept awake for 24 hours straight, while Val follows her normal sleep routine. In this study, David is part of the

Question

Quizplus · Accepted Answer

David is the one undergoing the experimental manipulation of sleep deprivation, making him part of the experimental group. Val is presumably part of the control group, as she is following her normal sleep routine, which serves as a comparison for David's reaction time.

David and Val Both Take Part in a Research Study