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Psychometric properties of the irlen perceptual reading scale in an ecuadorian child population

Abstract:

The Irlen Reading Perceptual Scale (IRPS) has been used as an assessment instrument to determine the presence of Irlen Syndrome (IS; Physical Discomfort [PD] and Visual Perceptual Distortions [VPD]) worldwide. However, there are questionings about the validity and Reliability of the instrument. The main objective of the present study was to test the psychometrics of the section 1 of the IRPS for Ecuadorian children populations. Participants were 409 schoolchildren from 7 to 11 years old from the urban area of Cuenca, Ecuador. A factorial analysis was carried out on the 32 items of section 1 of the IRSP. Alfa of Cronbach was used to evaluate the reliability of the dimensions that the factor analysis drew. As a result, five empirical dimensions instead of the two theoretical dimensions were found. Nevertheless, these five dimensions fit properly in the two theoretical dimensions. This instrument can be used both for evaluation of the IS and for the intervention with the Irlen Method (IM).