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A Psychometric Evaluation of the Motor-Behavioral Assessment Scale for Use as an Outcome Measure in Rett Syndrome Clinical Trials
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Raspa, Melissa; Bann, Carla M.; Gwaltney, Angela; Benke, Timothy A.; Fu, Cary; Glaze, Daniel G.; Haas, Richard; Heydemann, Peter; Jones, Mary; Kaufmann, Walter E.; Lieberman, David; Marsh, Eric; Peters, Sarika; Ryther, Robin; Standridge, Shannon; Skinner, Steven A.; Percy, Alan K.; Neul, Jeffrey L. – American Journal on Intellectual and Developmental Disabilities, 2020
Rett syndrome (RTT) is a neurodevelopmental disorder that primarily affects females. Recent work indicates the potential for disease modifying therapies. However, there remains a need to develop outcome measures for use in clinical trials. Using data from a natural history study (n = 1,075), we examined the factor structure, internal consistency,…
Descriptors: Genetic Disorders, Psychometrics, Psychomotor Skills, Physical Disabilities
Factorial Validity of the Supports Intensity Scale (SIS)
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Kuppens, Sofie; Bossaert, Goele; Buntinx, Wil; Molleman, Catherin; Van den Abbeele, Ann; Maes, Bea – American Journal on Intellectual and Developmental Disabilities, 2010
The Supports Intensity Scale (SIS) was developed to provide information on the support needs of persons with intellectual disability. Our aim here was to evaluate the factorial validity of the SIS in a sample of 14,862 persons with intellectual disability. The structure of the instrument as promulgated by the developers was tested and its…
Descriptors: Mental Retardation, Validity, Factor Structure, Measures (Individuals)