Validation of the Polish version of the Short Form of the Five Facet Mindfulness Questionnaire

The objective of this study is to validate the Polish adaptation of the Short Form of the Five Facet Mindfulness Questionnaire (FFMQ-SF; Bohlmeijer, Klooster, Fledderus, Veehof, & Baer) – a 24-item inventory measuring mindfulness in daily life – in a Polish sample. The psychometric properties of the Polish version were assessed in a sample of 885 individuals: 710 meditation-naïve and 175 meditation-advanced ones. The following psychometric properties were examined: reliability (internal consistency, temporal stability, discriminant validity), internal validity (confirmatory factor analyses), and convergent validity (correlation between the five FFMQ facets and neuroticism, emotional stability, rumination, openness to experience, ego strength, extraversion, and reflection). The results confirmed the reliability (internal consistency, temporal stability, discriminant validity), internal validity (the orthogonal 5-factor model), and convergent validity of the Polish adaptation in a nonclinical meditation-naïve and meditation-advanced population aged 15-63. The FFMQ-SF proved to be an effective instrument for measuring mindfulness in nonclinical meditation-naïve and meditation-experienced Polish samples. Further replications in clinical samples are needed.