Rates of agreement among alternative definitions of reading disability and their 1- and 2-year stabilities were examined using a new measure of agreement, the affected-status agreement statistic. Participants were 288,114 first through third grade students. Reading measures were "Dynamic Indicators of Basic Early Literacy Skills" Oral…

Results of a survey of 47 state departments of public instruction regarding eligibility criteria for the identification of children with mental retardation are compared to results of 1981-82 and 1985-86 surveys. Although states continue to vary widely in definitions and procedures, more states now specify assessments of intelligence, adaptive…