The student clearly describes and explains the research design, detailing the use of an independent measures design with random assignment to reduce bias and improve internal validity. They effectively outline the sampling technique of opportunity sampling, emphasizing the selection of participants based on availability, and provide relevant characteristics of the participants, including age, gender, and English proficiency. The student justifies their choice of participants by highlighting their cognitive maturity and the importance of shared understanding in the valuation task. Furthermore, the student identifies and describes the controlled variables, offering clear reasoning for their selection to enhance the study's validity. Lastly, they comprehensively list and clarify the materials used in the methodology, ensuring a thorough understanding of their experimental design.
