Thank you for your enquiry. The SJTs for selection to the Foundation Programme are written, reviewed and quality assured by clinicians working closely with foundation doctors and foundation doctors themselves, and they are written to assess the attributes of the national person specification, and are in line with the GMC Good Medical Practice, and they are thus contextualised by the clinical situations. The webpage on SJT development (http://www.isfp.org.uk/SJT/Pages/Item-development.aspx) will give you an overview of how the SJTs are developed and what they assess. Please refer to the research, design & development work, and results of the SJT pilots (2010, 2011, 2012) for detailed information about the process of developing the SJT items themselves and the design of the SJT assessment e.g. http://www.isfp.org.uk/AboutISFP/Pages/Reports-FinalReport-appendices.aspx
In early June, the UKFPO (http://www.foundationprogramme.nhs.uk/pages/home) will be publishing the FP 2013 Applicant Handbook, alongside a monograph on the SJT (how to approach items, how the answer key is developed, how your answers are scored, the rationale for should vs would) as well as a worked practice paper. These resources will be available free of charge to all applicants, and will provide you with the familiarisation material and useful resources to prepare you for the SJT.
Will Riddington, Improving Selection to the Foundation Programme