The instruments used by psychologists will vary depending on the nature of the problem. The assessments are standardised, which means that the client’s performance can be compared to that of other learners of his or her age. There are also specific instrument requirements set out by the GDE and IEB that will be accepted for accommodation applications. The length of an assessment will vary depending on the type of assessments used and the client’s work speed. The ideal time for administering of assessments is usually in the morning and a sufficient time of the day needs to be set aside for the completion of the assessments.