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Development of a computerized adaptive test for Schizotypy assessment.

Fonseca-Pedrero E, Menéndez LF, Paino M, Lemos-Giráldez S, Muñiz J - PLoS ONE (2013)

Bottom Line: The Information Function estimated using the Gradual Response Model indicated that the item pool effectively assesses schizotypy at the high end of the latent trait.The correlation between the CAT total scores and the paper-and-pencil test was 0.92.The mean number of presented items in the CAT with the standard error fixed at ≤ 0.30 was of 34 items.

View Article: PubMed Central - PubMed

Affiliation: Department of Educational Sciences, University of La Rioja, La Rioja, Spain ; Center for Biomedical Research in the Mental Health Network (CIBERSAM), Madrid, Spain.

ABSTRACT

Background: Schizotypal traits in adolescents from the general population represent the behavioral expression of liability for psychotic disorders. Schizotypy assessment in this sector of population has advanced considerably in the last few years; however, it is necessary to incorporate recent advances in psychological and educational measurement.

Objective: The main goal of this study was to develop a Computerized Adaptive Test (CAT) to evaluate schizotypy through "The Oviedo Questionnaire for Schizotypy Assessment" (ESQUIZO-Q), in non-clinical adolescents.

Methods: The final sample consisted of 3,056 participants, 1,469 males, with a mean age of 15.9 years (SD=1.2).

Results: The results indicated that the ESQUIZO-Q scores presented adequate psychometric properties under both Classical Test Theory and Item Response Theory. The Information Function estimated using the Gradual Response Model indicated that the item pool effectively assesses schizotypy at the high end of the latent trait. The correlation between the CAT total scores and the paper-and-pencil test was 0.92. The mean number of presented items in the CAT with the standard error fixed at ≤ 0.30 was of 34 items.

Conclusion: The CAT showed adequate psychometric properties for schizotypy assessment in the general adolescent population. The ESQUIZO-Q adaptive version could be used as a screening method for the detection of adolescents at risk for psychosis in both educational and mental health settings.

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Correlation between the dichotomous total test score and the score obtained with the dichotomous CAT.
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pone-0073201-g003: Correlation between the dichotomous total test score and the score obtained with the dichotomous CAT.

Mentions: With the aim of checking the validity of the CATs, the total scores on the pencil-and-paper ESQUIZO-Q were correlated with the two modalities of the CAT. As can be observed in Figure 2, the correlations between the ESQUIZO-Q total score and the estimated θ for the polytomous CAT was 0.92. In the case of the dichotomous CAT (see Figure 3), the correlation between them was 0.88. It is worth mentioning that the value of the Pearson correlation between the ESQUIZO-Q polytomous and dichotomous total scores, according to CTT, was 0.82.


Development of a computerized adaptive test for Schizotypy assessment.

Fonseca-Pedrero E, Menéndez LF, Paino M, Lemos-Giráldez S, Muñiz J - PLoS ONE (2013)

Correlation between the dichotomous total test score and the score obtained with the dichotomous CAT.
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3760882&req=5

pone-0073201-g003: Correlation between the dichotomous total test score and the score obtained with the dichotomous CAT.
Mentions: With the aim of checking the validity of the CATs, the total scores on the pencil-and-paper ESQUIZO-Q were correlated with the two modalities of the CAT. As can be observed in Figure 2, the correlations between the ESQUIZO-Q total score and the estimated θ for the polytomous CAT was 0.92. In the case of the dichotomous CAT (see Figure 3), the correlation between them was 0.88. It is worth mentioning that the value of the Pearson correlation between the ESQUIZO-Q polytomous and dichotomous total scores, according to CTT, was 0.82.

Bottom Line: The Information Function estimated using the Gradual Response Model indicated that the item pool effectively assesses schizotypy at the high end of the latent trait.The correlation between the CAT total scores and the paper-and-pencil test was 0.92.The mean number of presented items in the CAT with the standard error fixed at ≤ 0.30 was of 34 items.

View Article: PubMed Central - PubMed

Affiliation: Department of Educational Sciences, University of La Rioja, La Rioja, Spain ; Center for Biomedical Research in the Mental Health Network (CIBERSAM), Madrid, Spain.

ABSTRACT

Background: Schizotypal traits in adolescents from the general population represent the behavioral expression of liability for psychotic disorders. Schizotypy assessment in this sector of population has advanced considerably in the last few years; however, it is necessary to incorporate recent advances in psychological and educational measurement.

Objective: The main goal of this study was to develop a Computerized Adaptive Test (CAT) to evaluate schizotypy through "The Oviedo Questionnaire for Schizotypy Assessment" (ESQUIZO-Q), in non-clinical adolescents.

Methods: The final sample consisted of 3,056 participants, 1,469 males, with a mean age of 15.9 years (SD=1.2).

Results: The results indicated that the ESQUIZO-Q scores presented adequate psychometric properties under both Classical Test Theory and Item Response Theory. The Information Function estimated using the Gradual Response Model indicated that the item pool effectively assesses schizotypy at the high end of the latent trait. The correlation between the CAT total scores and the paper-and-pencil test was 0.92. The mean number of presented items in the CAT with the standard error fixed at ≤ 0.30 was of 34 items.

Conclusion: The CAT showed adequate psychometric properties for schizotypy assessment in the general adolescent population. The ESQUIZO-Q adaptive version could be used as a screening method for the detection of adolescents at risk for psychosis in both educational and mental health settings.

Show MeSH
Related in: MedlinePlus