Example 5: Caffeine and Learning Does ingesting caffeine randomized experiment t

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Example 5: Caffeine and Learning Does ingesting caffeine randomized experiment to test this. Give all details, including the use of placebos and blinding. You have 20 mice to work with. help mice learn the way through a maze faster? Describe a well-designed Example 6: Is the Dominant Hand Stronger? Describe a Matched Pairs experiment to see if right hand strength is greater than left-hand strength in right-handed people. You have a hand-grip to measure strength and 30 right-handed people to use in your study. Be sure to include how randomization is used in your design. Quick Self-Quiz: Randomized Experiments Design a randomized comparative experiment to determine whether taking vitamin B supplements helps memory. You have 40 people to use in the study and the study will take place over one month.

Explanation / Answer

5)

We randomly divide the mice into two groups of 10 mice each. We give half the mice caffeine in their food while the other group gets identical food without caffeine (placebo). We make the study double-blind by not telling the mice or anyone interacting with the mice (for example, whoever is timing the maze runs) which mice are getting the caffeinated food and which are not. We measure the time it takes for the mice to learn the maze and compare the results between the two groups.

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