Literature review should cover the following

• Approaches to problem solving research (Especially a through discussion on domain specific and domain independent approaches, benefits for example transferability issues.
• Cognitive processes involved in problem solving research, its development and progression and teach ability issues.
• Assessment of problem solving with complex task design
• Problem solving as a construct
• Conceptual model/Construct/progression or Framework selected for this study and Why?
• Use of IRT in Educational researches (Measurement Model).
• A thorough review of Rash Unidimensional and multi-dimensional models.
• The difference between Rash Model and Bayesian statistics and its application.
• How to address the validity issues of the scale. (discussion on especially on Messick’s Criteria of validity)