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Dunst, Carl J.; Hamby, Deborah W. – Journal of Intellectual & Developmental Disability, 2012
This paper includes a nontechnical description of methods for calculating effect sizes in intellectual and developmental disability studies. Different hypothetical studies are used to illustrate how null hypothesis significance testing (NHST) and effect size findings can result in quite different outcomes and therefore conflicting results. Whereas…
Descriptors: Intervals, Developmental Disabilities, Statistical Significance, Effect Size
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Maes, Bea; Lambrechts, Greet; Hostyn, Ine; Petry, Katja – Journal of Intellectual & Developmental Disability, 2007
Background: This study provides an overview of empirical research on the effectiveness of quality-enhancing interventions for people with profound intellectual and multiple disabilities (PIMD). Method: Through computerised searches of the PsycINFO and ERIC databases, and using several search criteria specifically relating to the target group and…
Descriptors: Program Effectiveness, Multiple Disabilities, Community Involvement, Client Characteristics