Specific recommendations are made concerning the circumstances under which the benefits of out-of-level testing outweigh the problems associated with it. Topics explored are: various methods for deciding when a set of test scores is invalid and the utility of these methods for local evaluators, the accuracy of vertical scaling, and the usefulness…

This handbook is intended for persons who might develop or use an item bank to support their testing program. An item bank is defined as a "large collection of distinguishable test items," with "large" explained as meaning that the number of items available is greater than the number to be used in any one test. The first section of the handbook…