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Item-saving assessment of self-care performance in children with developmental disabilities: A prospective

Cheng-Te Chen1, Yu-Lan Chen2, Yu-Ching Lin3,4

  • 1Department of Educational Psychology and Counseling, National Tsing Hua University, Hsinchu, Taiwan, R.O.C.

Plos One
|March 22, 2018
PubMed

Insights

A new computerized adaptive test (CAT-SC) efficiently measures self-care performance in children with developmental disabilities. This tool provides precise results using significantly fewer items, aiding clinical and research applications.

Area of Science:

  • Developmental Psychology
  • Pediatric Rehabilitation
  • Psychometrics

Background:

  • Accurate assessment of self-care performance is crucial for children with developmental disabilities (DD).
  • Existing assessment methods may be lengthy and less efficient for this population.
  • Development of precise and efficient measurement tools is needed for clinical and research settings.

Purpose of the Study:

  • To construct a Computerized Adaptive Test for Self-Care (CAT-SC) for children with DD (aged 6 months to 12 years).
  • To ensure the CAT-SC measures self-care performance accurately, inclusively, and efficiently.
  • To validate the CAT-SC's psychometric properties and optimize its administration.

Main Methods:

  • Developed a 73-item item bank for the CAT-SC.
  • Utilized item response theory (IRT) to analyze data from 215 caregivers, assessing unidimensionality, item fit, and differential item functioning (DIF).
  • Conducted a simulation study to establish stopping rules and evaluate reliability and concurrent validity.

Main Results:

  • The final CAT-SC item bank comprised 56 items, with suggested stopping rules based on reliability (>0.9) or test length (14 items).
  • Simulations indicated that 85% of scores achieved >0.9 reliability with a mean test length of 8.5 items.
  • The CAT-SC administered 75-84% fewer items than the full bank, with highly similar performance estimates (Pearson r = 0.98).

Conclusions:

  • The CAT-SC efficiently and precisely measures self-care performance in children with DD, comparable to typically developing children.
  • The CAT-SC item bank demonstrates good reliability and a unidimensional self-care construct.
  • The CAT-SC offers a valuable tool for assessing self-care performance in clinical and research settings, reducing assessment time significantly.
Abstract

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