George Warren Brown School of Social Work at Washington University in St. Louis
Center for Mental Health Services Research

CMHSR Measures Collection

Inventory of Interpersonal Problems (IIP)

Location: D16

AUTHORS: Horowitz, L. et al. (1988)

SOURCE:
Horowitz, L., Rosenberg, S. E., Baer, B. A., Ureno, G. Villasenor, V. S. (1988). Inventory of Interpersonal Problems:
    Psychometric Properties and Clinical Applications. Journal of Consulting and Clinical Psychology, 56(6), 885-892.

VARIABLES: Levels of interpersonal distress

PURPOSES: To help patients and therapists identify interpersonal sources of distress

DESCRIPTION/DEVELOPMENT:
The Inventory of Interpersonal Problem is designed to measure interpersonal distress experienced by psychiatric patients and evaluate the change over the course of treatment.  The IIP represents a comprehensive list of the interpersonal problems report at intake by clients seeking out-patient psychotherapy.
This 127-item measure has six subscales, they are: hard to be assertive, hard to be sociable, hard to be intimate, hard to be submissive, too responsible, and too controlling.

SUBJECTS: This inventory is tested among the patient at psychiatry department.

ADMINISTRATION: Not available

SCORING:
The IIP uses a five-point scale from 0 (not distressed at all by this problem) to 4 (extremely distressed by this problem) on each of 127 item.  The levels of distress of a patients is obtained by summing the score of each item.

RELIABILITY:
1.  Internal consistence: a=.82 to .94 (each subscale)
2. Test-retest correlation: r=.98 (complete scale), and r=.81 to .80 (each subscale)

VALIDITY:
Criterion validity:
1). SCL-90: r=.64 (time I) to r=.57 (time II).
2). Global Outcome Rating: Rmean=.62

Sensitivity to Change:
A empirical study showed that the IIP is more sensitive than SCL-90 in detecting the changes over the course of treatment.

COMMENTS: This inventory is not in file.

References:
Horowitz, L., Rosenberg, S. E., Baer, B. A., Ureno, G. Villasenor, V. S. (1988). Inventory of Interpersonal Problems:
    Psychometric Properties and Clinical Applications. Journal of Consulting and Clinical Psychology, 56(6), 885-892.

Barkham, M., Hardy, G. E., & Startup, M. (1994). The structure, validity and clinical relevance of the Inventory of
    Interpersonal Problems. British Journal of Medical Psychology, 67, 171-185.


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