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The Service Needs Inventory (SNI) is a new integrated measure for assessing mental health and criminogenic needs in criminal justice-involved persons with mental illness. This tool enhances assessment efficiency and identifies service needs.

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Area of Science:

  • Forensic Psychology
  • Clinical Psychology
  • Psychometrics

Background:

  • Existing measures for mental health and criminogenic needs are separate.
  • There is a need for an integrated assessment tool for criminal justice-involved persons with mental illness (CJ-PMI).

Purpose of the Study:

  • To develop and validate the Service Needs Inventory (SNI), an integrated measure for assessing mental health functioning and criminogenic needs.
  • To evaluate the reliability and validity of the SNI in a CJ-PMI population.

Main Methods:

  • Multistudy series involving item analysis, reliability analysis (internal consistency and test-retest), and concurrent validity examination.
  • The SNI was reduced from 197 to 94 items across two studies.
  • Concurrent validity was assessed using Pearson's correlation coefficients.

Main Results:

  • The SNI demonstrated good internal consistency (range .60–.93) and high test-retest reliability (r = .91).
  • Preliminary concurrent validity was established with medium to large associations (r = .41–.67).
  • The SNI retained eight subscales: Criminal History, Antisocial Attitudes and Associates, Positive Psychotic Symptomology, Social Functioning, Social Networking, Substance Abuse, Negative Affect, and Traumatic History.

Conclusions:

  • The SNI is a reliable and valid integrated measure for assessing CJ-PMI.
  • The SNI can improve assessment efficiency and service identification in forensic and correctional settings.
  • The SNI is suitable for both research and clinical applications.