Psychology > Adult Mental Health > Adult Mental Health > Brief Symptom Inventory 18 (BSI 18)

Brief Symptom Inventory 18 (BSI 18)

Key information

Quickly measure and monitor psychological distress


Leonard R Derogatis

Publication Year:


Age Range:

18 years and older


Individual - 4 minutes

Qualification Code:


Read the full product description

The Brief Symptom Inventory 18 (BSI 18) is designed with reliability in mind. The BSI 18 assessment gathers patient-reported data to help measure psychological distress and psychiatric disorders in medical and community populations. As the latest in an integrated series of test instruments that include the SCL-90-R®, BSI® (53 questions), and DPRS® instruments, the BSI 18 test offers a more effective, easy-to-administer tool to help support clinical decision-making and monitor progress throughout treatment.

Guidance on using BSI 18 in your Telepractice

Digital scoring and reporting option available on Q-global®


How To Use This Test

Psychologists, psychiatrists, physicians, nurses and other health care professionals can use the BSI 18 assessment to help:

  • Assess patients at intake for psychological problems
  • Measure patient progress during and after treatment to monitor change
  • Support managed care decisions
  • Provide outcomes measurement for treatment programs

Key Features

  • The BSI 18 test can be completed in approximately 4 minutes. Designed to be brief and easy to administer, the BSI 18 assessment is well-suited for helping measure symptom change throughout treatment.
  • The test helps measure three primary symptom dimensions and is designed to provide an overview of a patients symptoms and their intensity at a specific point in time.
  • Dimension and global scores form the BSI 18 test correlate highly (i.e., > .90) with analogous score from the SCL-90-R test based on a large community population.


Symptom Scales
SOM - Somatization
DEP - Depression
ANX - Anxiety

Global Indices
GSI - Global Severity Index, Helps measure overall psychological distress level

Psychometric Information

Adult community norms
The adult community norms are based on 1,122 individuals—605 males and 517 females.

Oncology Norms
The oncology norms are based on 1,543 individuals—802 males and 741 females.

Profile Report

Presents raw and normalised T scores for each of the nine Primary Symptom Dimensions and the three Global Indices. For adults, the plotted T scores are profiled based on your choice of the nonpatient, outpatient or inpatient norms. (The T scores for the remaining norm groups are printed below the profile.) For adolescents, the plotted T scores are based on the adolescent nonpatient norms.


Q-global® - Our web-based system for scoring and reporting paper administrations

Q-global logo

Q-global® is our secure and affordable web-based platform for test administration, scoring and reporting. It houses the industry's gold standard in assessment tools and is accessible from any computer connected to the Internet. Q-global helps you quickly and efficiently organise examinee information, generate scores, and produce accurate comprehensive reports.

Pay-per-use reporting

Customers wishing to administer and score this assessment onscreen, can now pay per-report, giving you the flexibility to pay as the assessment is used.

Learn more about -Q-global


Price list

BSI-18 Manual

Manual - Print
ISBN: 9780749154486
£46.00 inc VAT
Available in 21 days after placing your order

BSI 18 Hand-Scoring Answer Sheets

Pkg of 50. Test items included.
ISBN: 9780749154523
£92.39 inc VAT

BSI 18 Hand-Scoring Profile Forms - Oncology Norms

Oncology Norms - Pkg of 50
ISBN: 9780749154516
£37.80 inc VAT
Currently out of stock, available to pre-order

BSI-18 Q-global Digital Manual

ISBN: 9780749115791
£32.99 inc VAT

BSI 18 Q-global Profile Report

Tiered pricing discounts available
ISBN: 9780749166076
£3.84 inc VAT

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