Psychometric Properties and Normative Data Using Item Response Theory Approach for Three Neuropsychological Tests in Waranka Children Population.

Objective: To evaluate the psychometric properties of the Shortened Version of the Token Test (SVTT), the Peabody Picture Vocabulary Test (PPVT-III), and the Rey-Osterrieth Complex Figure (ROCF) using an item response theory (IRT) framework and to establish normative data for Waranka children and adolescents based on their ability scores.

Methods: A total of 436 healthy people aged between 6 and 17 participated in this study. The factor structure was evaluated using confirmatory factor analysis (CFA) and the difficulty and discrimination parameters using IRT through the two-parameter logistic model for the SVTT and PPTV-III, while for the ROCF, the graded response model was used.

Normative data for executive function tests in an Ecuadorian Waranka minority population.

To generate normative data (ND) for executive functions tests in the Waranka minority population of Ecuador. Four-hundred participants aged 6-17 completed the Symbol-Digit Modalities Test (SDMT), Trail-Making Test (TMT), Modified-Wisconsin Card Sorting Test (M-WCST), and Test of Colors-Words (STROOP). Scores were normed using multiple linear regressions, including age, age, natural logarithm of mean parent education (MPE), sex, bilingualism, and two-way interactions as predictors.