# The Adolescent Insomnia Questionnaire: the Turkish validity and reliability study

## TL;DR

This study confirms that the Turkish version of the Adolescent Insomnia Questionnaire is a valid and reliable tool for assessing insomnia in teenagers.

## Contribution

This is the first Turkish validity and reliability study of the Adolescent Insomnia Questionnaire.

## Key findings

- The Turkish version of the Adolescent Insomnia Questionnaire showed high internal consistency with Cronbach's α coefficients above 0.80.
- Confirmatory factor analysis indicated good fit indices, supporting the questionnaire's construct validity.
- The questionnaire demonstrated strong correlations with the Cleveland Adolescent Sleepiness Questionnaire.

## Abstract

This study aimed to evaluate the Turkish validity and reliability of the Adolescent Insomnia Questionnaire.

The study was carried out with 265 adolescents. Data were collected with the Adolescent Insomnia Questionnaire and the Cleveland Adolescent Sleepiness Questionnaire. Exploratory factor analysis and confirmatory factor analysis were used to analyze the construct validity of Adolescent Insomnia Questionnaire. The scale reliability was tested using test-retest, Cronbach's α test, Pearson correlation analysis, and inter-item correlation analysis.

The Cronbach's α coefficients were found to be above 0.80 for all sub-dimensions and the total scale. Correlations between Adolescent Insomnia Questionnaire and Cleveland Adolescent Sleepiness Questionnaire scores were positively highly significant. The test-retest correlation analysis of Adolescent Insomnia Questionnaire was 0.675. The results of confirmatory factor analysis were χ2/df=2.861, comparative fit index=0.966, incremental fit index=0.966, Tucker-Lewis index=0.956, normed fit index=0.949, root-mean-square error of approximation=0.084. The suitability of the data for exploratory factor analysis was evaluated with Bartlett's test of sphericity (p<0.05), and the sample adequacy was evaluated with the Kaiser-Meyer-Olkin test (0.77).

The Adolescent Insomnia Questionnaire Turkish version is a valid and reliable tool for measuring insomnia in adolescents aged 11–18 years. Adolescent Insomnia Questionnaire is a brief, practical, self-reported, age-appropriate, easily applicable, valid, and reliable tool in Turkish. This is the first Turkish validity and reliability study of Adolescent Insomnia Questionnaire.