Dr. Berry hypothesizes that consumption of sugar is a direct cause of children\'

Question

Dr. Berry hypothesizes that consumption of sugar is a direct cause of children's misbehavior. To test this hypothesis, he enlists the assistance of a teacher in a preschool setting to give half of the children snacks and drinks that contain sugar and give the other half of the children similar snacks and drinks that are sugar-free. Dr. Berry then counts the number of children's misbehavior in each condition. He conducts some of his observations in the morning and some in the afternoon after naptime. To ensure the most valid research results, what additional step should the teacher take before providing snacks? make sure no one is allergic to the foods being used randomly assign which kind of snack goes to each student secure permission from each participating student randomly select only student who will be cooperative

Explanation / Answer

Due to increase in the sugar level in the blood, the adrenaline hormone content in blood increases due to which children misbehaves.

To validate this hypothesis, half of the children are given sugar containing snacks and half are given sugar free snacks.

Seeking permission from each participating student or using only one cooperative student will not validate the research results.

To get valid research results there should be a random list of which student got which type of snacks. This will ensure valid research result.

Hence the 2nd option from the above is correct.

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