Experimental Design in Caffeine Study

Very Easy Research Summaries Experimental Design

A group of scientists wanted to understand how different levels of caffeine affect the heart rate of mice. They divided the mice into four groups: one group received no caffeine, one group received a low dose, one group received a medium dose, and one group received a high dose of caffeine. After administering the caffeine, they measured the heart rates of the mice after 30 minutes.

Which of the following statements describes a key aspect of the experimental design used in this study?

The experiment includes a control group that received no caffeine.

All mice received the same amount of caffeine.

The heart rates were measured only once.

The researchers did not monitor the mice for side effects.

Hint

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