All four of these types of tests compare each person's performance to a predetermined standard. Standardized tests are tests that are administered and scored in a consistent manner, allowing for comparisons of performance across different individuals. Nonstandardized tests, on the other hand, do not have a set format or scoring system, making it difficult to compare performance across individuals. Norm-referenced tests compare an individual's performance to the average performance of a specific group, such as their peers or a national sample. Criterion-referenced tests compare an individual's performance to a specific set of criteria or standards, rather than comparing to the performance of others.
