Pica is a very serious and often life threatening problem which occurs largely in persons with developmental disabilities. The topic has received sporadic attention from researchers for several decades. This paper reviews definitions, diagnostic implications, causes, prevalence, and assessment methods that have been described in the research…

Two experiments involving 143 and 1,480 individuals with severe and profound mental retardation found that persons with profound mental retardation were more likely to evince sterotypies or self-injury (SIB) compared to their severely impaired counterparts. Those with stereotypies were more likely to present with autism, organicity, and eating…