Question 1. a. Explain what is meant by the term ‘factorial design'.
b. Explain what is meant by the term ‘within-subjects design' and identify the two main advantages of using such a design.
c. Given the advantages of within-subjects designs, why is it often preferable to use between-subjects designs?
d. Explain what is meant by the term ‘mixed-model design' and discuss how using such a design can sometimes allow researchers to enjoy the benefits of within subjects designs while avoiding some of their most serious drawbacks.