Question: If results do not match my hypothesis, it could be an error in amount of supplementation given. 15 mg of niacin was the recommended amount

If results do not match my hypothesis, it could be an error in amount of supplementation given. 15 mg of niacin was the recommended amount of niacin supplementation for adults nineteen years or older according to the National Institutes of Health Office of Dietary Supplements. Additional internal validity threats may be because the participant receiving the placebo pill may believe they are experiencing an effect of the niacin, placebo effect. External validity is limited since the study only represents college aged individuals. can you reword this

If results do not match my hypothesis, it could
If results do not match my hypothesis, it could be an error in amount of supplementation given. 15 mg of niacin was the recommended amount of niacin supplementation for adults nineteen years or older according to the National Institutes of Health Office of Dietary Supplements. Additional internal validity threats may be because the participant receiving the placebo pill may believe they are experiencing an effect of the niacin, placebo effect. External validity is limited since the study only represents college aged individuals

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