This guide explains the concept of out-of-level testing and suggests a formula for estimating the occurrence of floor effects and ceiling effects, within the context of models for evaluating Elementary Secondary Education Act (ESEA) Title I programs. An analogy explains floor and ceiling effects as if test items are stored in different levels in a…

Data available from the Fall and Spring administration of the Stanford Achievement Test: Intermediate I: Form X and the Otis-Lennon Mental Ability Test for all Title I pupils in the State of New Hampshire plus a random sample for the entire state, made possible the item-by-item comparison of Fall and Spring performance on the same groups of…