The student clearly describes and explains the research design, correctly identifying it as independent measures and explaining how it was applied in their study. The relevant characteristics of the research participants are also described, including their age and ethnicity. The student states the controlled variables and provides reasons for control for each one. However, the student should have explained the sampling technique used and the choice of participants in more detail. Additionally, they should have provided a reason behind the choice of each material used. Overall, the student demonstrates a good understanding of the research design and controlled variables, but there is room for improvement in explaining the sampling technique, choice of participants, and choice of materials.
