The role of the psychologist in personal injury litigation is to define from the psychological perspective the nature of the injury and provide a formulation as to how that injury has given rise, and will give rise, to pain and suffering, loss of amenity, and financial losses and costs. If negotiation or mediation does not resolve a dispute, proceedings will be issued. A lawyer then will be responsible for representing the claimant at every stage of the claim. The role of the psychologist flows from the legal definition of injury and from the legal processes of evaluating claims arising from such injuries. In this, he/she plays the role of an expert witness giving the expert's qualifications, lists materials and tests to be relied upon. The psychologist is also expected to be skilled in working within a legal framework and in presenting oral and written evidence.