Preliminary validity and reliability testing of a structured clinical interview for pathological gambling

Area of Science:

• Psychiatry
• Clinical Psychology
• Behavioral Science

Background:

• Pathological gambling (PG) is a significant mental health concern.
• Accurate diagnosis is crucial for effective treatment of gambling disorders.
• Existing diagnostic tools require robust psychometric validation.

Purpose of the Study:

• To evaluate the psychometric properties of the clinician-administered, DSM-IV-based, structured clinical interview for pathological gambling (SCI-PG).
• To assess the reliability, validity, and diagnostic accuracy of the SCI-PG in individuals seeking treatment for gambling problems.

Main Methods:

• The SCI-PG was administered to 72 consecutive subjects presenting with gambling problems.
• Inter-rater and test-retest reliability were assessed.
• Concurrent validity was examined using the South Oaks Gambling Screen (SOGS).
• Discriminant validity was assessed against anxiety and depression measures.
• Classification accuracy was determined via longitudinal assessment of illness course.

Main Results:

• The SCI-PG exhibited excellent inter-rater and test-retest reliability.
• Strong concurrent validity was found when compared to the SOGS.
• The SCI-PG demonstrated good discriminant validity from anxiety and depression measures.
• High sensitivity and specificity were observed in diagnosing pathological gambling based on longitudinal outcomes.

Conclusions:

• The SCI-PG is a reliable and valid instrument for diagnosing pathological gambling in individuals with gambling problems.
• The interview demonstrates strong psychometric properties suitable for clinical use.
• Further replication in diverse populations is recommended to confirm generalizability.