Pediatric Evaluation of Disability Inventory™


The PEDI-CAT measures abilities in the three functional domains of Daily Activities, Mobility and Social/Cognitive.  The PEDI-CAT’s Responsibility domain measures the extent to which the caregiver or child takes responsibility for managing complex, multi-step life tasks.  The PEDI-CAT can be used across all clinical diagnoses and community settings.  As with the original paper-pencil PEDI, the PEDI-CAT can be administered by professional judgment of clinicians or educators who are familiar with the child or by parent report.

This computerized adaptive version of the PEDI is intended to provide an accurate and precise assessment while increasing efficiency and reducing respondent burden. The PEDI-CAT software utilizes Item Response Theory (IRT) statistical models to estimate a child’s abilities from a minimal number of the most relevant items or from a set number of items within each domain.  All respondents begin with the same item in each domain in the middle of the range of difficulty or responsibility and the response to that item then dictates which item will appear next (a harder or easier item), thus tailoring the items to the child and avoiding irrelevant items. The CAT program then displays the results instantly.

Intended Population

The PEDI-CAT is designed for use with  children and youth (birth through 20 years of age) with a variety of physical and/or behavioral conditions.


• Identification of functional delay
• Examination of improvement for an individual child after intervention
• Evaluation and monitoring of group progress in program evaluation and research


• Normative standard scores, provided as age percentiles and T scores, are available for 21
age groups (intervals of one year).
• Scaled scores are based on data from the normative and disability samples.
• Each PEDI-CAT domain is self-contained and can be used separately or along with the other domains.
• Age, gender and mobility device filters prevent irrelevant items from being presented.
• Items are worded using everyday language and clear examples.
• Illustrations of Daily Activities and Mobility items are included to facilitate understanding of the item intent.
• The PEDI-CAT is available  for iPads and PCs. Each download includes English and Spanish languages

. Visit Website for more information about the PEDI-CAT, including the domains, scoring, and ordering the instrument.



Pediatric Evaluation of Disability Inventory™

The original PEDI™ is a descriptive measure of a child’s current functional performance and can track changes over time. The PEDI™ measures both capability and performance of functional activities in three content domains:

• Self-care
• Mobility
• Social function

It can be used as a comprehensive clinical assessment of key functional capabilities and performance in children between the ages of six months and seven years. The PEDI™ can be used to evaluate older children with functional abilities that are less than those expected of a 7-year-old child without disabilities.

The PEDI™ is available for order through Pearson Education, Inc.


Selected References

1.  Allen DD, Ni P, Haley SM. Efficiency and sensitivity of multidimensional computerized adaptive testing of pediatric physical functioning. Disabil Rehabil. 2008;30(6):479-484. Abstract

2.  Coster W, Haley S, Ni P, Dumas H, Fragala Pinkham MA. Assessing self-care and social function using a computer adaptive testing version of the pediatric evaluation of disability inventory Arch Phys Med  Rehabil. 2008;89(4):622-629. Abstract

3.  Fragala-Pinkham MA, Haley SM, Goodgold S. Evaluation of a community-based group fitness program for children with disabilities. Pediatric Physical Therapy. 2006;18(2):159-167. Abstract

4.  Haley S, Ni P, Fragala-Pinkham M, Skrinar A, Corzo D. A computer adaptive testing approach for assessing physical function in children and adolescents. Developmental Medicine and Child Neurology. 2005;47(2):113-120.  Abstract

5.  Haley S, Ni P, Ludlow L, Fragala-Pinkham M. Measurement precision and efficiency of multidimensional computer adaptive testing of physical functioning using the Pediatric Evaluation of Disability Inventory. Archives of Physical Medicine and Rehabilitation. 2006;87:1223-1229.  Abstract

6.  Haley SM, Fragala-Pinkham M, Ni P. Sensitivity of a computer adaptive assessment for measuring functional mobility changes in children enrolled in a community fitness programme. Clinical Rehabilitation. 2006;20(7):616-622.  Abstract

7.  Haley SM, Raczek AE, Coster WJ, Dumas HM, Fragala-Pinkham MA. Assessing mobility in children using a computer adaptive testing version of the Pediatric Evaluation of Disability Inventory (PEDI). Archives of Physical Medicine and Rehabilitation. 2005;86:932-939.  Abstract

8.  Kramer JM, Coster WJ, Kao YC, Snow A, Orsmond GI. A New Approach to the Measurement of Adaptive Behavior: Development of the PEDI-CAT for Children and Youth with Autism Spectrum Disorders. Phys Occup Ther Pediatr. 2011 Aug 17. [Epub ahead of print] Abstract

9. Dumas H, Fragala-Pinkham M, Haley S, Coster W, Kramer J, Kao YC, Moed R. Item bank development for a revised pediatric evaluation of disability inventory (PEDI).  Phys Occup Ther Pediatr. 2010 Aug;30(3):168-84.  Abstract

10. Dumas HM, Fragala-Pinkham MA, Haley SM. Development of a postacute hospital item bank for the new Pediatric Evaluation of Disability Inventory-Computer Adaptive Test.  Int J Rehabil Res. 2010 May 31. [Epub ahead of print]  Abstract

11.  Stahlhut M, Christensen J, Aadahl M.  Applicability and intrarespondent reliability of the pediatric evaluation of disability inventory in a random Danish sample.  Pediatr Phys Ther. 2010 Summer;22(2):161-9.  Abstract

12. Haley SM, Coster WI, Kao YC, Dumas HM, Fragala-Pinkham MA, Kramer JM, Ludlow LH, Moed R.  Lessons from use of the Pediatric Evaluation of Disability Inventory: where do we go from here? Pediatr Phys Ther. 2010 Spring;22(1):69-75. Review.  Abstract

13. Dumas HM, Haley SM, Ludlow LH.  Achieving a minimally important difference in physical function during pediatric inpatient rehabilitation.  Int J Rehabil Res. 2008 Sep;31(3):257-60.  Abstract

14.  Østensjø S, Bjorbaekmo W, Carlberg EB, Vøllestad NK.  Assessment of everyday functioning in young children with disabilities: an ICF-based analysis of concepts and content of the Pediatric Evaluation of Disability Inventory (PEDI).  Disabil Rehabil. 2006 Apr 30;28(8):489-504.  Abstract

15.  Ho ES, Curtis CG, Clarke HM.  Pediatric Evaluation of Disability Inventory: its application to children with obstetric brachial plexus palsy.  J Hand Surg Am. 2006 Feb;31(2):197-202.  Abstract

16.  Berg M, Jahnsen R, Frøslie KF, Hussain A.  Reliability of the Pediatric Evaluation of Disability Inventory (PEDI).  Phys Occup Ther Pediatr. 2004;24(3):61-77.  Abstract

17.  Iyer LV, Haley SM, Watkins MP, Dumas HM.  Establishing minimal clinically important differences for scores on the pediatric evaluation of disability inventory for inpatient rehabilitation. Phys Ther. 2003 Oct;83(10):888-98.  Abstract

18. Kothari DH, Haley SM, Gill-Body KM, Dumas HM. Measuring functional change in children with acquired brain injury (ABI): comparison of generic and ABI-specific scales using the Pediatric Evaluation of Disability Inventory (PEDI). Phys Ther. 2003 Sep;83(9):776-85.  Abstract

19. Feldman AB, Haley SM, Coryell J.  Concurrent and construct validity of the Pediatric Evaluation of Disability Inventory. Phys Ther. 1990 Oct;70(10):602-10.  Abstract