1. Ask yourself questions about the study, such as: Was the study repeated? What was the sample size? Is this representative of the larger population? What variables were held constant? Was there a control? What factors might affect the outcome? 2. Read the “Materials and Methods” and “Results” sections multiple times: Carefully examine the graphs, tables, and diagrams. Try to interpret the data first before reading the captions and details. Make sure you understand the article fully.