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Validation of Sensory Outcome Measure: Findings from the 2011 Survey of Pathway to Diagnosis and Services

  • Korean Journal of Occupational Therapy
  • Abbr : Korean J of Occup Ther
  • 2019, 27(4), pp.167-182
  • DOI : 10.14519/kjot.2019.27.4.13
  • Publisher : Korean Society Of Occupational Therapy
  • Research Area : Medicine and Pharmacy > Working Therapeutics
  • Received : October 26, 2019
  • Accepted : November 15, 2019
  • Published : December 30, 2019

Mi Jung Lee 1 Karen Ratcliff 2 Claudia L. Hilton 2 Hong, Ickpyo 3

1Dept. of Occupational Therapy, University of Florida
2Dept. of Occupational Therapy, University of Texas Medical Branch
3Division of Rehabilitation Sciences, University of Texas Medical Branch

Accredited

ABSTRACT

Objective: To evaluate item-factor structures of the 15 sensory items from the Survey of Pathways to Diagnosisand Services (Pathways) and examine the best fitting model. Methods: The study subjects were 1,968 children aged 6-17 years, who had ever been diagnosed with AutismSpectrum Disorder (ASD) and/or Intellectual Disability (ID). Factor analyses and item response theory modelswere used to determine the best fitting item-factor structure of the sensory items. The Strengths andDifficulties Questionnaires (SDQ) was used to test the concurrent validity of the sensory severity estimates. Results: A bifactor MIRT model (a general and four sensory factors) was selected as the best fitting model. Allitems statistically fitted to the bifactor model (p > .01) and showed moderate correlations with all five subscalesof the SDQ (rs = .31 ~.51, p < .0001). The general sensory score differentiated the four different diagnosticgroups (ASD, ID, ASD with ID, and no current symptoms) [F (3,1961) = 207.4, p < .0001]. Conclusion: The Pathways sensory items yielded reliable estimates of the general and each corresponding sensoryfactor by applying a bifactor MIRT model. The sensory score can be used as a valid sensory measure in thepopulation survey.

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