LAUSR

Abstract The Five Facet Mindfulness Questionnaire (FFMQ) assesses several dimensions of mindfulness. The objective of this study was to develop a short version of the FFMQ for children and adolescents. The main sample consisted of 829 participants (51% boys; 10–18 years old). From this initial sample, 789 participants (49% boys) completed the FFMQ at a 6-month follow-up. A second independent sample (N = 418, 50% boys; 12–16 years old) was used to confirm the factor structure. Confirmatory factor analyses with the full version supported a structure composed of 5 correlated factors (1 per facet) plus 2 correlated method factors representing the method effect (positive and negative) of the items. From this model, the FFMQ–A–SF was derived, consisting of 25 items (5 per facet). The measure displayed adequate internal consistency, and invariance was confirmed over time and across different age groups. The analysis of the relationship between mindfulness facets and temperament and psychological problems provided additional evidence for the construct validity of the questionnaire. It is concluded that the FFMQ–A–SF presents acceptable validity and reliability in children and adolescents. However, the positive versus negative wording of the items could affect the responses of younger participants.