Propiedades psicométricas de un Instrumento de Tamizaje para Autismo (ITEA) en niños y adolescentes del Ecuador

Catalina López, María Elena Sandoval, María de Lourdes Larrea, Ylonka Tillería, Byron Torres, Rodrigo Moreta-Herrera, Carol Caldas, Daniela Acosta, Andrea Gallárraga, Verónica Sandoval, María Belén Gómez

Producción científica: Contribución a una revistaArtículorevisión exhaustiva

Resumen

This study explores factorial validity of the Autism Spectrum Screening Test (ITEA) for the identification of autism in schooled children and adolescents in Ecuador. The psychometric study analyzes the validity and reliability, as well as internal consistency of the elements of the scale. The sample consisted of 848 autistic people, and 350 non-autistic, of ages between 4 and 17 years old, who attended regular schools. The Confirmatory Factor Analysis shows that the ITEA adjustment model behaves adequately for the Ecuadorian population, corroborated by means of a model of four first-order factors and a second-order general agglutinating factor with 32 items, in fact, the absolute, relative, and non-centrality-based fit indicators confirm this. In addition, the scale is highly reliable in terms of internal consistency with ω= .92 [.91 - .93], since it allows obtaining greater precision in the evaluation of the studied construct. It can be concluded that evidence of factorial validity and reliability show that the ITEA, in its structural model, is adequately adjusted for the screening of autism in schooled children with ages between 4 to 17 years old in Ecuador. According to Support Vector Machines (SVM), which allows information regarding the accuracy of each evaluated item, the set of 42 items reached 89.04% Analysis using the Request for Evidence test (RFE) showed that, in order to increase the accuracy level of ITEA, 31 items exceeded the global value. Regarding the 7 categories evaluated (language, communication, social skills, affectivity, information processing, inflexibility, and sensory perception), a value of 89.387% was obtained, according to the SVM algorithm with “rbf” kernel. The data shows the ability of ITEA to show specific characteristics to identify autism.

Título traducido de la contribuciónPsychometric properties of an Autism Screening Instrument (ITEA) in children and adolescents from Ecuador
Idioma originalEspañol
Páginas (desde-hasta)39-48
Número de páginas10
PublicaciónRevista Ecuatoriana de Neurologia
Volumen32
N.º2
DOI
EstadoPublicada - 2023
Publicado de forma externa

Nota bibliográfica

Publisher Copyright:
© 2023 Fundacion para la difusion neurologica en Ecuador - FUNDINE. All rights reserved.

Palabras clave

  • adolescent population
  • autism
  • child
  • Ecuador
  • reliability
  • screening
  • validity

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