Research Designs
Researchers were interested in learning the effects of trans fats on levels of cholesterol in the blood. Two different research designs were constructed.
Between-Groups Design
In the between-groups design, researchers were interested in whether cholesterol levels would differ depending on diet. Twenty participants were randomly assigned to one of two different groups. Group A was assigned a diet rich in fruits and vegetables and with no trans fats. Group B participants were asked to follow their normal diets, which contained varying levels of trans fats depending on the individual. After one month, blood samples were drawn and the following levels of cholesterol were obtained:
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Research Methodologies
The effects of trans fats on cholesterol levels in the blood were studied by researchers. There were two different research designs created.
Design for Intergroups
Researchers wanted to see if cholesterol levels differed based on food in the between-groups study. Twenty individuals were assigned to one of two groups at random. A diet high in fruits and vegetables and low in trans fats was given to Group A. Participants in Group B were asked to stick to their regular diets, which contained varied amounts of trans fats depending on the person. After a month, blood samples were taken and the following cholesterol levels were determined:
