BASIS-24^®

A leading behavioral health assessment from the client’s perspective.

The 24-item Behavior and Symptom Identification Scale, BASIS-24^®, is a leading behavioral health assessment tool designed to assess the outcome of mental health or substance abuse treatment from the client’s perspective. Typically, BASIS-24^® is given at admission and discharge for inpatient or residential programs, and at intake/initiation of treatment and then periodically thereafter in partial hospital or ambulatory/outpatient care settings. Grounded in the latest scientific methods of survey development and validation, the BASIS-24^® underwent extensive field testing as part of a multi-year research and development process and has been validated for use with individuals in inpatient, residential, partial and outpatient settings. BASIS-24^® is also validated in both Spanish and English.

See service levels Request a license

Adult patient in a quiet conversation with a clinician — **24-item self-report** · Adult symptom measure Plate 03 / 09

Hands holding a self-report questionnaire and pen — **24-item self-report** · Adult symptom measure Plate 03 / 09

N° 0124Items, one page
N° 026Symptom domains
N° 035minAverage completion
N° 04EN/ESAvailable languages

What it measures

Six major symptom and functioning domains.

The scale measures the level of difficulty experienced over the past week across six major symptom and functioning domains. The 24 items generate an overall score plus six subscale scores using a weighted average algorithm.

Depression and Functioning.
Interpersonal Relationships.
Self-Harm.
Emotional Lability.
Psychosis.
Substance Abuse.

Clinician reviewing BASIS-24 output with a colleague

Purpose & application

Built for providers, researchers, and accreditation.

BASIS-24^® was designed for mental health providers, researchers, service purchasers, accreditation agencies, and quality assurance departments to measure change in consumer self-reported symptom and problem difficulty over the course of treatment.

The instrument is not diagnosis-specific — it crosses diagnostic boundaries and works for the broad range of patients seen in real-world behavioral health settings.

Service levels

Three ways to use BASIS-24^®.

Level One. License the survey with independent scoring capability.
Level Two. License plus WebScore scoring and reporting (desktop or tablet).
Level Three. License plus comprehensive quarterly eBASIS reports.

See full service levels →

Usage requirements

An end-user license approved by eBASIS is required.

Use of BASIS-24^® requires an end-user license approved by eBASIS. Interested organizations should complete an inquiry form to receive licensing information, fees, and agreements.