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Development of a computerized adaptive test for Schizotypy assessment
Eduardo Fonseca-Pedrero1, Luis Fernando Menéndez, Mercedes Paino
1Department of Educational Sciences, University of La Rioja, La Rioja, Spain ; Center for Biomedical Research in the Mental Health Network (CIBERSAM), Madrid, Spain.
Plos One
|September 11, 2013
Summary
A new Computerized Adaptive Test (CAT) effectively assesses schizotypal traits in adolescents. This tool, based on the Oviedo Questionnaire for Schizotypy Assessment (ESQUIZO-Q), shows promise for early psychosis risk screening.
Area of Science:
- Psychiatry
- Psychometrics
- Adolescent Mental Health
Background:
- Schizotypal traits in adolescents are behavioral indicators of psychosis vulnerability.
- Advancements in schizotypy assessment necessitate updated psychological and educational measurement tools.
Purpose of the Study:
- To develop a Computerized Adaptive Test (CAT) for evaluating schizotypy using the Oviedo Questionnaire for Schizotypy Assessment (ESQUIZO-Q).
- To assess schizotypy in non-clinical adolescent populations.
Main Methods:
- A sample of 3,056 adolescents (1,469 males, mean age 15.9 years) participated.
- The ESQUIZO-Q was adapted into a CAT format.
Main Results:
- The ESQUIZO-Q CAT demonstrated strong psychometric properties via Classical Test Theory and Item Response Theory.
- The CAT accurately assessed high levels of schizotypy, correlating highly (0.92) with the paper-and-pencil version.
- The adaptive test averaged 34 items to achieve a standard error of ≤ 0.30.
Conclusions:
- The CAT is a psychometrically sound tool for assessing schizotypy in adolescents.
- The ESQUIZO-Q CAT can serve as a screening method for identifying adolescents at risk for psychosis in educational and mental health settings.
