Beliefs may be described as Type A, scientific and verifiable (objective), or Type B, not verifiable and personal (subjective). Type B might be considered subjective opinion, something other than empirically confirmed, objective truth. Nevertheless, Type B is asserted as truth by some and can be valued over Type A. Both kinds of belief are…

Discussion of the methods of meta-analysis first identifies problems associated with research integration, the limitations of traditional review techniques, and the advantages of quantitative methods. Meta-analytic procedures are described with respect to how they parallel classical scientific method, including problem formulation, sampling,…

Twenty-four meta-analyses in mental retardation, learning disabilities, and emotional/behavior disorders were reviewed and analyzed across six domains of information necessary for securing face validity of published meta-analyses. Wide variations that could influence summative results were found. Additionally, temporal analysis of 44 meta-analyses…