Development and validation of brief content scales for the Psychological Screening Inventory-2

Area of Science:

• Psychological assessment
• Psychometrics
• Clinical psychology

Background:

• The Psychological Screening Inventory-2 (PSI-2) is a tool for psychological assessment.
• Existing scales may benefit from supplementary content for enhanced screening.
• Brief Content (BC) scales offer a targeted approach to psychological assessment.

Purpose of the Study:

• To develop and validate 21 new Brief Content (BC) scales for the PSI-2.
• To assess the utility of these BC scales for both the PSI-2 and the original PSI.
• To provide supplementary screening information beyond existing measures.

Main Methods:

• Development of 21 BC scales comprising statistically homogeneous items.
• Replication of scales across three diverse datasets: PSI/PSI-2 normative data and forensic respondents.
• Concurrent validity assessed through correlations with MMPI-2 scales, observer ratings, and therapist ratings.

Main Results:

• Successful development of 21 BC scales with demonstrated statistical homogeneity.
• Replication across multiple datasets supports the generalizability of the BC scales.
• Significant correlations with MMPI-2, observer, and therapist ratings confirm concurrent validity.

Conclusions:

• The 21 BC scales effectively supplement the PSI-2, offering valuable additional screening data.
• These scales are validated for use with both the PSI-2 and the original PSI.
• The BC scales provide focused screening information, not a comprehensive psychopathology assessment.