◂ Back

Dysfunctional Beliefs and Attitudes About Sleep Scale - 30 (DBAS-30)

Title of the Portuguese Version

Escala de Crenças Disfuncionais sobre o Sono

Original Version

Morin, C. M. (1993)

Portuguese Version

Clemente, V., Allen Gomes, A., & Moutinho dos Santos, J. (2007, 2013)

General Description

Dysfunctional Beliefs and Attitudes about Sleep is a 30-item scale assessing various beliefs, attitudes, expectations, and attributions about sleep and insomnia. In the original instrument, subjects are asked to place a mark for each statement on a 10-centimeter horizontal line with poles labeled “strongly agree” and “strongly disagree.” In the Portuguese version, it was used a 10-point Likert scale for each item. Except for Item 23, for which the score is reversed, a higher score indicates a more dysfunctional belief.

  • Morin, C. M. (1993). Insomnia: Psychological assessment and management. New York: Guilford Press.


Vanda Clemente – vandaclem@gmail.com