In response to Hallahan et al, the authors suggest that variability in prevalence is a function of the methods used to examine prevalence differences and that the effect specific discrepancy criteria for learning disabilities have on the number of students identified is the critical issue. (Author/DB)

Though clinical judgement is necessary for appropriate diagnosis and provision of services to learning disabled children, such judgement must be based on objective evidence. A statistical procedure for applying the severe discrepancy criterion dictated in federal regulations is suggested for objectifying learning disability diagnosis. (Author/DB)

The proposal put forward in this presentation centers on the use of the microcomputer for the generation of educational research, both as a powerful tool for information collection and as a means for analyzing the generated data. The microcomputer-based laboratory (MBL) principles described in this paper may be used in rural classroom settings as…