Development and Validation of a Six-Item Version of the Interpersonal Dependency Inventory Academic Article uri icon


MeSH Major

  • Dependency (Psychology)
  • Interpersonal Relations
  • Personality Inventory
  • Psychometrics


  • The Interpersonal Dependency Inventory (IDI) is a frequently used, 48-item measure of maladaptive dependency. Our goal was to develop and psychometrically evaluate a very brief version of the IDI. An exploratory factor analysis of the IDI in Study 1 ( N = 838) yielded a six-item IDI (IDI-6), with three items loading on an emotional dependency factor (IDI-6-ED), and the other three items loading on a functional dependency factor (IDI-6-FD). This factor solution was validated by confirmatory factor analysis in Study 2 ( N = 916). The IDI-6-ED and IDI-6-FD demonstrated good convergent and divergent validity in Study 3 ( N = 100). In Study 4 ( N = 22-43), the IDI-6-ED and IDI-6-FD were generally stable over 4-week and 8-week intervals and were found to be responsive to the effects of psychological treatment. These results have implications for dependency conceptualizations and support the IDI-6 as a brief, psychometrically sound instrument.

publication date

  • April 2017



  • Academic Article



  • eng

Digital Object Identifier (DOI)

  • 10.1177/1073191115605178

PubMed ID

  • 26349499

Additional Document Info

start page

  • 360

end page

  • 370


  • 24


  • 3