Antipsychotic Medication Beliefs and Attitudes Scale (AMBAS)

Title of the Portuguese Version

Escala de Crenças e Atitudes em Relação à Medicação Antipsicótica

Portuguese Version

Martins, Pinto, Castilho, Macedo, Pereira, ... & Barreto-Carvalho (2019)

General Description

The Antipsychotic Medication Beliefs and Attitudes Scale (AMBAS) was designed to measure medication adherence in individuals with psychotic spectrum disorders. The final version of the scale ended up with 12 statements tapping into clinical (e.g., “When I take this medication, I can think in a clearer manner”), psychosocial (e.g., “I’m ashamed of taking this medication”)

and practical factors (e.g., “I find it difficult to take the medication as recommended by the doctor”) recognized as key predictors of medication adherence. Participants are invited to rate the extent to which they agree with each statement using a 5-point Likert scale from 0 (completely disagree) to 4 (completely agree). This scale is designed for higher results to reflect greater adherence to antipsychotic medication.

  • Martins, M.J., Pinto, A.M., Castilho, P., Macedo, A., Pereira, AT., … & Barreto-Carvalho, C. (2019). Assessing beliefs and attitudes towards antipsychotic medication from a recovery-based perspective: Psychometric properties of a new scale. Psychiatry Research, 273, 325-330


Maria João Martins –