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Diagnostic and Statistical Manual of Mental Disorders (DSM) criteria for borderline personality disorder (BPD) show differences across age groups. Developmental adjustments may be needed for accurate BPD assessment in adolescents and adults.

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Area of Science:

  • Psychiatry
  • Clinical Psychology
  • Developmental Psychology

Background:

  • The Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5) criteria for borderline personality disorder (BPD) lack specific developmental considerations.
  • Understanding how BPD criteria function across different age groups is crucial for accurate diagnosis and treatment.
  • Previous research has not fully explored the developmental operationalization of BPD criteria in adolescents versus adults.

Purpose of the Study:

  • To investigate whether DSM criteria for BPD operate similarly in adolescents and adults.
  • To determine if developmental adjustments are necessary for the application of DSM BPD criteria.
  • To identify potential sources of differential functioning in BPD criteria across age groups.

Main Methods:

  • Recruitment of three age cohorts: adolescents (12-17 years), young adults (18-25 years), and adults (≥26 years).
  • Administration of the Child Interview for DSM-IV BPD to adolescents and the Structured Clinical Interview for DSM-IV Axis II disorders to adults.
  • Application of item response theory (IRT) to assess differential item functioning (DIF) of BPD criteria across age groups, followed by qualitative analyses.

Main Results:

  • Item response theory analyses revealed significant differential item functioning (DIF) for all DSM BPD criteria when comparing adolescents and adults.
  • Qualitative analyses indicated that rater/interviewer bias is a likely source contributing to the observed DIF.
  • Behavioral criteria may reflect heterotypic features of BPD, while intra- and interpersonal criteria may represent homotypic features.

Conclusions:

  • The study demonstrates that DSM BPD criteria do not function uniformly across developmental stages, highlighting the need for age-specific considerations.
  • Rater bias appears to be a significant factor influencing the differential functioning of BPD criteria.
  • Recommendations are proposed for developing developmentally informed guidelines for BPD assessment to improve diagnostic accuracy.