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Direct linkGanz, Jennifer B.; Davis, John L.; Lund, Emily M.; Goodwyn, Fara D.; Simpson, Richard L. – Research in Developmental Disabilities: A Multidisciplinary Journal, 2012
The Picture Exchange Communication System (PECS) is a widely used picture/icon aided augmentative communication system designed for learners with autism and other developmental disorders. This meta-analysis analyzes the extant empirical literature for PECS relative to targeted (functional communication) and non-targeted concomitant outcomes…
Descriptors: Participant Characteristics, Multiple Disabilities, Mental Retardation, Autism
Mudford, Oliver C.; Hogg, James; Roberts, Jessica – American Journal on Mental Retardation, 1997
Continuous observational recording over 57 hours evaluated behavior states of three adults with profound and multiple disabilities. Two independent observers also recorded for 22 hours. Although overall percentage agreement was satisfactory (above 80%), agreement on occurrence was unsatisfactory (mean of 65%). Agreement data were superimposed on…
Descriptors: Data Analysis, Data Collection, Evaluation Methods, Interrater Reliability
