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The Five Facets Mindfulness Questionnaire (FFMQ) is a popular tool in mindfulness research. However, its psychometric qualities and its replicability have caused controversy. This study carried out a psychometric review and a conceptual replication of the FFMQ latent structure. The review showed that previous validation studies of the FFMQ used nonoptimal methods. In addition, this conceptual replication study tested the structure of the FFMQ using frequentist and Bayesian techniques. The original structure did not provide a good fit with both techniques, while the proposed alternative provided mixed results. We also found systematic fit improvements in both techniques when the Observe facet was excluded and method factors were included. With these findings, we conclude that the conceptual replication of the FFMQ’s structure failed. Alternatively, we propose a new provisional FFMQ model with a set of recommendations regarding its application. Future research proposals on improving techniques and models toward mindfulness assessment are also presented and discussed.

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