(3 pts.) What is the difference between a free operant preference assessment and a response restriction preference assessment? What are the similarities (6 pts.) Explain the Progressive Model of conducting stimulus preference assessments as recommended in Karsten et al. (2011). Briefly describe each step in the process. (3 pts.) What was the general finding in Morris and Vollmer's (2020) article on Social Interaction Preference Assessment (SIPA) as it relates to the efficacy of social reinforcement and stability? What were some limitations that should be considered when examining these data?