Which of these is a key feature of an experimental study?
AThe treatment in the experiment should be simple enough for each individual in the experimental group to understand.
BThe treatment in the experiment must vary for each individual in the experimental group.
CThe treatment in the experiment must be applied to each of the individuals in the experimental group.
DThe treatment in the experiment should be short so that each individual is tested quickly.
AThe treatment in the experiment should be simple enough for each individual in the experimental group to understand.
BThe treatment in the experiment must vary for each individual in the experimental group.
CThe treatment in the experiment must be applied to each of the individuals in the experimental group.
DThe treatment in the experiment should be short so that each individual is tested quickly.