Cited by 754Personality Disorders and PsychopathologyPersonality Traits and PsychologyPsychoanalysis and Psychopathology Research

Development and Validation of a Self-Report Measure of Mentalizing: The Reflective Functioning Questionnaire

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Fonagy, Peter, Luyten, Patrick, Moulton-Perkins, Alesia, Lee, Ya-Wen, Warren, Fiona, Howard, Susan, Ghinai, Rosanna, Fearon, Pasco +1 more·2016·PLOS ONE

Abstract

Reflective functioning or mentalizing is the capacity to interpret both the self and others in terms of internal mental states such as feelings, wishes, goals, desires, and attitudes. This paper is part of a series of papers outlining the development and psychometric features of a new self-report measure, the Reflective Functioning Questionnaire (RFQ), designed to provide an easy to administer self-report measure of mentalizing. We describe the development and initial validation of the RFQ in three studies. Study 1 focuses on the development of the RFQ, its factor structure and construct validity in a sample of patients with Borderline Personality Disorder (BPD) and Eating Disorder (ED) (n = 108) and normal controls (n = 295). Study 2 aims to replicate these findings in a fresh sample of 129 patients with personality disorder and 281 normal controls. Study 3 addresses the relationship between the RFQ, parental reflective functioning and infant attachment status as assessed with the Strange Situation Procedure (SSP) in a sample of 136 community mothers and their infants. In both Study 1 and 2, confirmatory factor analyses yielded two factors assessing Certainty (RFQ_C) and Uncertainty (RFQ_U) about the mental states of self and others. These two factors were relatively distinct, invariant across clinical and non-clinical samples, had satisfactory internal consistency and test-retest stability, and were largely unrelated to demographic features. The scales discriminated between patients and controls, and were significantly and in theoretically predicted ways correlated with measures of empathy, mindfulness and perspective-taking, and with both self-reported and clinician-reported measures of borderline personality features and other indices of maladaptive personality functioning. Furthermore, the RFQ scales were associated with levels of parental reflective functioning, which in turn predicted infant attachment status in the SSP. Overall, this study lends preliminary support for the RFQ as a screening measure of reflective functioning. Further research is needed, however, to investigate in more detail the psychometric qualities of the RFQ.

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Authors
Fonagy, P., Luyten, P., Moulton-Perkins, A., Lee, Y.-W., Warren, F., Howard, S., Ghinai, R., Fearon, P., & Lowyck, B.
Affiliations
  • University College London (GB)
  • University of Surrey (GB)
  • KU Leuven (BE)
Corresponding author
Fonagy, Peter
Venue
PLOS ONE
Published
2016-07-08
Volume
11
Issue
7
Pages
e0158678
ISSN
1932-6203 (ISSN-L)
OpenAlex
W2468117220
Cited by
754
References
113
Citations by year
2026: 102 · 2025: 106 · 2024: 112 · 2023: 108 · 2022: 84 · 2021: 95 · 2020: 54 · 2019: 34 · 2018: 32 · 2017: 21 · 2016: 3 · 2015: 1
FWCI
39.84
Type
journal article
Language
en
Open access
Locations
  • PLoS ONE (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Lirias (KU Leuven) (submittedVersion, other-oa)
  • RePEc: Research Papers in Economics (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
  • UCL Discovery (University College London) (submittedVersion)
Funders
  • National Institute for Health Research (NF-SI-0514-10157)
  • Economic and Social Research Council (RES-060-25-0044)
Topics
  • Social Sciences › Psychology › Clinical Psychology › Personality Disorders and Psychopathology
  • Social Sciences › Psychology › Clinical Psychology › Personality Traits and Psychology
  • Social Sciences › Psychology › Clinical Psychology › Psychoanalysis and Psychopathology Research
Keywords
mentalization, reflective functioning, self-report measure development, borderline personality disorder, eating disorders, parental reflective functioning, infant attachment, Strange Situation Procedure, empathy, mindfulness, perspective taking, psychometric validation, factor structure
MeSH terms
Female, Humans, Male, Psychometrics, Surveys and Questionnaires, Theory of Mind, Self Report

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