Development and Validation of a Six-Item Version of the Interpersonal Dependency Inventory.
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.
1 Ohio University, Athens, OH, USA.
Andrew S
AS
McClintock
1 Ohio University, Athens, OH, USA.
Shannon M
SM
McCarrick
1 Ohio University, Athens, OH, USA.
Timothy
T
Anderson
1 Ohio University, Athens, OH, USA.
Lina
L
Himawan
2 University of Texas Medical Branch, Galveston, TX, USA.
Robert
R
Hirschfeld
D000223:Adaptation, Psychological; D000293:Adolescent; D003858:Dependency, Psychological; D005260:Female; D006380:Helplessness, Learned; D006801:Humans; D007398:Interpersonal Relations; D008297:Male; D008403:Mass Screening; D010555:Personality Inventory / Q000706:statistics & numerical data*; D011594:Psychometrics / Q000706:statistics & numerical data*; D015203:Reproducibility of Results; D055815:Young Adult
emotional dependency; functional dependency; interpersonal dependency; measure refinement; screener