What Assessments Are Involved in Positive Behaviour Support?
When a participant is referred for Positive Behaviour Support, one of the first questions families and Support Coordinators ask is: "What's actually going to happen?" It all starts with assessments. The assessments required in positive behaviour support aren't paperwork for paperwork's sake — they're the foundation that makes every strategy in the plan defensible, person-centred and safe. Without them, any intervention is guesswork.
Here's a simple map of the core assessments a PBS practitioner typically completes, and why each one matters.
Why Assessment Matters in Positive Behaviour Support
Behaviour support without assessment is like prescribing medication without a diagnosis — technically possible, but rarely right. Good PBS practice is evidence-driven. Every strategy in a Behaviour Support Plan should trace back to a specific piece of assessment data.
Assessments also bring the right people into the room. Families, support workers, GPs, psychologists, school staff, SIL providers, OTs — each holds a piece of the picture. The PBS practitioner's job is to pull those pieces into a single clinical story. The depth of assessment scales with complexity: an interim Behaviour Support Plan may rely on a shorter assessment window, while a comprehensive plan requires the full set.
1. Functional Behaviour Assessment (FBA)
The FBA is the cornerstone. It identifies the function a behaviour serves — what the person is trying to communicate, achieve or avoid. It draws on interviews with the participant (where possible), family, carers and support workers; direct observation; ABC (Antecedent–Behaviour–Consequence) analysis; and review of incident and medical history.
The Functional Behaviour Assessment report is where these findings are captured in a format the whole team can use.
2. Environmental and Ecological Assessment
Behaviours of concern rarely happen in a vacuum. An environmental assessment looks at the places a person lives, works, attends school or accesses in the community — noise, lighting, routines, social dynamics, physical safety, and whether the environment is set up for them to succeed.
It's one of the most practical — and most overlooked — assessments in PBS. Small environmental changes such as reducing sensory load, adjusting routines or repositioning a support worker often do more than any formal intervention.
3. Communication, Sensory and Skill-Based Assessments
This cluster asks: what does the participant already bring to the table, and what support do they need to communicate, regulate, and participate?
It typically includes:
- Communication profile — expressive and receptive language, use of AAC, non-verbal communication.
- Sensory profile — hypersensitivity and hyposensitivity patterns, regulation supports.
- Skills and strengths profile — daily living skills, social skills, interests and preferences.
Where relevant, the PBS practitioner will collaborate with OT, speech, and psychological assessment findings, so work already done well elsewhere isn't duplicated.
4. Risk, Medical and Medication Review
The practitioner also reviews:
- Risk — to the participant, staff, family and the community.
- Medical history — including diagnoses that may influence behaviour (e.g. epilepsy, chronic pain, trauma history).
- Medication — particularly psychotropic medications, with medication monitoring in place where chemical restraint is being used or reduced.
- Restrictive practices currently in place, and the reduction plan for each.
This is the layer that keeps the plan compliant with the NDIS Quality and Safeguards Commission and the broader PBS Capability Framework.
Bringing It All Together in the Behaviour Support Plan
None of these assessments stand alone. The strength of Positive Behaviour Support comes from weaving them together — functional behaviour assessments provide the answer to why, environmental assessments tells us where, communication and sensory assessments tell us how, risk and medical assessments tell us how safely. Together they produce a plan for the whole support team to follow, with evidence behind every strategy. This is the same evidence-based, person-centred foundation the Australian Psychological Society emphasises across allied health practice.
For families who feel overwhelmed by the process: this is normal. Good assessment takes time precisely because good support takes time. The practitioner's job is to carry the complexity so the participant and family don't have to.
If your participant needs a full Positive Behaviour Support assessment, AH2U can help. Book a chat with our PBS team on 1300 24 2428.
Positive Behaviour Support
