Deficits in understanding the mental state of others ("mind-reading") have been well documented in individuals with pervasive developmental disorders (PDD). However, it is unclear whether this deficit in social cognition differs between the subgroups of PDD defined by the Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition, Text…

The article critiques a 1987 (Kavale and Forness) meta-analysis which concluded that research does not support modality-based instruction. The study is faulted for its selection criteria as well as its failure to consider demographic differences, achievement level differences, multiplicity of preferences, definitions of terms, effect-size…

This response to Dunn (EC 221 793) reaffirms the conclusions of a meta analysis on modality-based instruction, through elaboration of the study's selection criteria and methodological factors. Although modality-based instruction is seen to be intuitively appealing, educators are encouraged, instead, to apply instructional methods of proven…