This study examined the underlying structure of the Nonverbal Literacy Assessment (NVLA), an instrument designed to measure emergent literacy for K-fourth-grade students with severe developmental disabilities. The NVLA was conceptualized as having six constructs that reflected emergent literacy skills: (a) phonemic awareness, (b) phonics, (c)…

In order to teach individuals with developmental disabilities to request stimuli they are motivated to obtain (mand), it is often necessary to initially deliver the item requested immediately and frequently. This may result in an undesirably high rate of mands that is impractical to maintain. The purpose of the current investigation was to extend…