Question

A researcher is studying the relationship between sugar consumption and weight gain. Twelve volunteers were randomly assigned to one of two groups. The first group had five participants which were put on a diet low in sugar and the other group with the remaining seven participants received 10% of their calories from sugar. After 8 weeks, weight gain was recorded from each participant.Which of the following principles was not used in this study?A.Repeated measures B. Blinding C. Randomization D. Control

Answer 1

Principles in Statitstic Studies

A. Repeated measures design is a research design that involves multiple measures of the same variable taken on the same or matched subjects either under different conditions or over two or more time periods.

This is performed in the described study since the same subjects are measured in different periods and in different conditions of weight.

B. Blinding in Statistics. Blinding, or double-blinding, is when a patient does not know what treatment they are receiving so it does not influence the final outcomes. This principle is used here, because none of the participants knew what was given to them.

C. Randomization refers to the practice of using chance methods (random number tables, flipping a coin, etc.) to assign subjects to treatments. We are not sure how the participants were assigned to the specific diet. They were randomly selected. This could refer to randomization.

D. Control refers to directly influency over the conditions of the subject of the study to ensure they all go through the exact same proccesses during the study. We know the groups received different diets in sugar contents, but the rest of their living variables were not controlled, thus this last principle was not used in this study