Question

select the correct answer.
which of these is a key feature of an experimental study?
a. the treatment in the experiment should be simple enough for each individual in the experimental group to understand
b. the treatment in the experiment must vary for each individual in the experimental group.
c. the treatment in the experiment must be applied to each of the individuals in the experimental group.
d. the treatment in the experiment should be short so that each individual is tested quickly.
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Explanation:

To determine the key feature of an experimental study, we analyze each option:

• Option A: The simplicity of the treatment for understanding is not a key feature of an experimental study. Experimental studies focus on applying a treatment, not its comprehensibility to participants.
• Option B: In an experimental study, the treatment is typically standardized (not varied) for the experimental group to isolate the effect. Varying the treatment would introduce confounding variables.
• Option C: A key feature of an experimental study is that the treatment (independent variable) is applied to the experimental group. This is essential to manipulate the variable and observe its effect on the dependent variable.
• Option D: The duration of the treatment (being short) is not a defining feature of an experimental study. Experimental studies can have long - term treatments depending on the research question.

Answer:

C. The treatment in the experiment must be applied to each of the individuals in the experimental group.