caa a22 4500 606178929 CHVBK 20210128100758.0 cr unu---uuuuu 210128e20151201xx s 000 0 eng 10.1007/s11136-015-1035-2 doi (NATIONALLICENCE)springer-10.1007/s11136-015-1035-2 Examining differential responses of youth with and without autism on a measure of everyday activity performance [Elektronische Daten] [Jessica Kramer, Kendra Liljenquist, Pengsheng Ni, Wendy Coster] Purpose: This study further investigated items with differential item function (DIF) in the Social/Cognitive domain of a measure of everyday activity performance, the Pediatric Evaluation of Disability Inventory-Computer Adapted Test version for Autism "PEDI-CAT (ASD),” to understand possible sources of response variation in a heterogeneous sample of youth with autism compared to the national standardization sample. Methods: Cross-sectional design. A convenience sample of parents who identified they had a child between 3 and 21years (M=11.9years, SD=4.67years) with autism (n=365) completed an online survey that included the PEDI-CAT (ASD) and descriptive measures. For 28 items previously identified as having DIF, the PEDI-CAT (ASD) expected item score curves for the autism sample were compared to the original PEDI-CAT standardization sample. The weighted area between expected score curves (wABC) was also calculated; values >0.24 indicate significant DIF. Results: All items had wABC that exceeded the criterion. Compared with peers without disabilities at the same ability level, 11 items were significantly more difficult for the youth with autism and 16 items were significantly easier. One item demonstrated non-uniform DIF. Conclusion: Differential responses could indicate that: (1) children with autism have a different developmental pattern of skill acquisition for everyday activities in the Social/Cognitive domain, or (2) parents of children with autism utilize a unique appraisal process when assessing their children's functional performance of everyday activities. Further research is required to better understand the factors leading to differential responses on the targeted items. The study illustrates the value of in-depth analysis of DIF to gain insight into the impact of a clinical condition on functional performance. Springer International Publishing Switzerland, 2015 Item response theory nationallicence Autistic disorder nationallicence Differential item function (DIF) nationallicence Kramer Jessica Ph.D. Program in Rehabilitation Sciences, Department of Occupational Therapy, Boston University, 02215, Boston, MA, USA aut Liljenquist Kendra Ph.D. Program in Rehabilitation Sciences, Department of Occupational Therapy, Boston University, 02215, Boston, MA, USA aut Ni Pengsheng Health and Disability Research Institute, Health Policy and Management, Boston University, Boston, MA, USA aut Coster Wendy Ph.D. Program in Rehabilitation Sciences, Department of Occupational Therapy, Boston University, 02215, Boston, MA, USA aut Quality of Life Research Springer International Publishing 24/12(2015-12-01), 2993-3000 0962-9343 24:12<2993 2015 24 11136 https://doi.org/10.1007/s11136-015-1035-2 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s11136-015-1035-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kramer Jessica Ph.D. Program in Rehabilitation Sciences, Department of Occupational Therapy, Boston University, 02215, Boston, MA, USA aut NATIONALLICENCE 700 1- Liljenquist Kendra Ph.D. Program in Rehabilitation Sciences, Department of Occupational Therapy, Boston University, 02215, Boston, MA, USA aut NATIONALLICENCE 700 1- Ni Pengsheng Health and Disability Research Institute, Health Policy and Management, Boston University, Boston, MA, USA aut NATIONALLICENCE 700 1- Coster Wendy Ph.D. Program in Rehabilitation Sciences, Department of Occupational Therapy, Boston University, 02215, Boston, MA, USA aut NATIONALLICENCE 773 0- Quality of Life Research Springer International Publishing 24/12(2015-12-01), 2993-3000 0962-9343 24:12<2993 2015 24 11136