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Childhood Autism Tool - Trivandrum (CAT-T) - Development and Validation.

Babu George1, Madhavi Sukumaran Razeena Padmam2, Muttathu Krishnapanicker Chandrasekharan Nair3

  • 1Developmental & Behavioral Pediatrics, KIMS Health, Thiruvananthapuram, Kerala, India. bgtvpm@gmail.com.

Indian Journal of Pediatrics
|July 29, 2025
PubMed
Summary
This summary is machine-generated.

A new 24-item tool, the Childhood Autism Tool-Trivandrum (CAT-T), was developed to diagnose Autism Spectrum Disorder (ASD) in young children in Kerala. This culturally appropriate measure demonstrates adequate validity and reliability for ASD diagnosis.

Keywords:
ASDCAT-TDevelopmentFactor analysisIndiaInternal consistencyReliabilityValidity

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Area of Science:

  • Child Psychology
  • Neurodevelopmental Disorders
  • Psychometric Measurement

Background:

  • Autism Spectrum Disorder (ASD) diagnosis in young children requires culturally sensitive tools.
  • Existing diagnostic measures may not be suitable for diverse populations, necessitating the development of region-specific instruments.
  • Early and accurate diagnosis of ASD is crucial for timely intervention and improved outcomes.

Purpose of the Study:

  • To develop and validate a culturally appropriate diagnostic tool for ASD in children aged 2-6 years in Kerala.
  • To ensure the measure meets established psychometric standards for reliability and validity.
  • To provide a reliable instrument for clinicians and researchers in the region.

Main Methods:

  • A qualitative study involving 200 children aged 2-6 years in Kerala.
  • Development of the Childhood Autism Tool-Trivandrum (CAT-T) following the COSMIN protocol.
  • Validation against established scales (CARS, VSMS) and exploratory factor analysis for construct validity.

Main Results:

  • A 24-item CAT-T was finalized after factor analysis.
  • CAT-T demonstrated moderate convergent and divergent validity with CARS and VSMS, respectively.
  • The tool exhibited excellent test-retest reliability (ICC=0.86), inter-rater reliability (ICC=0.89), and internal consistency (Cronbach's alpha=0.86).

Conclusions:

  • The 24-item CAT-T is a valid and reliable measure for diagnosing ASD in young children in Kerala.
  • The developed tool addresses the need for a culturally appropriate ASD diagnostic instrument in the region.
  • CAT-T provides a robust psychometric profile, supporting its use in clinical and research settings.