Positive Behaviour Support Explained: PBS, Practitioners, Plans

If you want Positive Behaviour Support explained in plain language, this guide covers what PBS is, how it differs from Applied Behaviour Analysis (ABA), who can deliver it, how restrictive practices are regulated, and how a behaviour support plan is developed. PBS is one of the most powerful and most misunderstood supports on the NDIS. When it is delivered well, it changes lives. When it is delivered badly, it can do real harm.

For young people aged 12 to 20 with behaviours of concern, PBS is often the missing piece. Families who have been told nothing works usually have not had a proper functional assessment, a real behaviour support plan, or a practitioner who understood adolescent development. This guide will help you tell the difference between good PBS and everything else.

What is Positive Behaviour Support?

Positive Behaviour Support is an evidence based framework that reduces behaviours of concern by understanding the reasons behind them, changing the environment, teaching new skills, and improving quality of life. PBS focuses on what a person is trying to communicate through behaviour, and on the conditions that make behaviour more or less likely.

PBS starts with a functional behaviour assessment (FBA). This is a structured assessment where a PBS practitioner spends time observing the young person, talking with family and staff, reviewing records, and analysing what triggers behaviour and what maintains it. The FBA produces a hypothesis about function: is the behaviour serving to escape a demand, gain attention, access something, or regulate sensory input?

From the FBA, the practitioner develops a behaviour support plan that includes prevention strategies, teaching strategies, response strategies, and quality of life goals. The plan is a living document. It is reviewed regularly and adjusted as the young person changes.

On the NDIS, PBS is funded from the Behaviour Support budget in a plan (called Improved Relationships on older plans). See our NDIS support codes guide for how it sits alongside the other supports on a plan.

How is PBS different from ABA?

Positive Behaviour Support and Applied Behaviour Analysis (ABA) share some roots but differ in important ways.

ABA originally emerged from behavioural psychology and focuses on shaping behaviour through reinforcement and consequence. Traditional ABA can be intensive, structured, and heavily focused on producing observable behaviour change. Some ABA approaches have been criticised for being compliance focused and for not centring the person’s own goals.

PBS is broader. It integrates behavioural science with person centred planning, human rights, quality of life, and the reduction of restrictive practices. PBS treats behaviour as communication and prioritises understanding function over changing behaviour for its own sake. Restrictive practices are a last resort in PBS and always require independent authorisation.

In the Australian NDIS context, PBS is the required framework. Practitioners must work within the NDIS Quality and Safeguards Commission’s rules, which are grounded in PBS principles. ABA can be delivered alongside PBS, but a compliant NDIS behaviour support plan will be PBS shaped, not pure ABA.

For young people with trauma, autism, or intellectual disability, a good PBS practitioner will not use compliance based methods. They will ask why the behaviour is happening, what it is protecting the young person from, and what skills or environmental changes will help.

Who can be a PBS practitioner on the NDIS?

Specialist behaviour support on the NDIS has to be delivered by a behaviour support practitioner approved by the NDIS Quality and Safeguards Commission. The Commission’s PBS Capability Framework describes four levels of capability:

• Core: practitioners building their skills, often with support from more experienced practitioners
• Proficient: independent practitioners with demonstrated competency
• Advanced: experienced practitioners handling complex situations
• Specialist: the most experienced level, often supervising others

Practitioners usually come from psychology, social work, occupational therapy, speech pathology or a related discipline, and keep building their PBS skills over time. A plan that includes a regulated restrictive practice must be written by an approved practitioner and lodged with the Commission. In NSW, the restrictive practice itself is then authorised through a separate process run by the implementing provider.

If someone offers “behaviour support” but isn’t an approved behaviour support practitioner, it might still be useful, but it won’t meet NDIS Commission requirements.

What are restrictive practices and how are they regulated?

A restrictive practice is any action that restricts the rights or freedom of movement of a person with disability. Under NDIS law there are five regulated categories:

1. Chemical restraint: medication used to control behaviour
2. Mechanical restraint: devices that restrict movement
3. Physical restraint: direct physical contact to restrict movement
4. Environmental restraint: locking doors, restricting access to areas
5. Seclusion: solitary confinement in a room the person cannot leave

Any regulated restrictive practice must be:

• Documented in a behaviour support plan written by an approved behaviour support practitioner
• Authorised by the relevant state authorising body (in NSW this is the DCJ Restrictive Practices Authorisation team)
• Reported monthly to the NDIS Commission
• Time limited and paired with strategies to reduce or eliminate the practice

Any unauthorised use of a restrictive practice is a reportable incident. The rules are strict for a reason. Restrictive practices have historically been overused and misused. PBS treats them as a last resort within a documented framework and always alongside strategies to phase them out.

Families and providers should never accept a “quick fix” that involves an unauthorised restrictive practice. It is unlawful and unsafe.

How is a behaviour support plan developed?

Plan development follows a structured process:

1. Referral and consent. The young person or their nominee agrees to the assessment.
2. Functional behaviour assessment. The practitioner gathers information from observation, interviews, records, and existing reports. This usually takes six to twelve weeks.
3. Hypothesis and formulation. The practitioner identifies the function of behaviour and the internal and external contributors.
4. Draft plan. Prevention strategies, teaching strategies, response strategies, quality of life goals, and (where relevant) authorised restrictive practices.
5. Consultation. The plan is shared with family, support workers, teachers, and other people who spend time with the young person.
6. Training. Everyone who will implement the plan is trained by the practitioner.
7. Implementation and monitoring. The plan is used in daily life. Data is collected.
8. Review. The plan is reviewed regularly, typically every six to twelve months.

A quality behaviour support plan is specific, practical, and useable by the people who deliver day to day support. If the plan is 40 pages of jargon that nobody can implement, it is not a working plan.

What are common mistakes in behaviour support?

The most common mistake is expecting fast results. A meaningful behaviour support plan takes months to develop and years to fully implement.

A second mistake is treating the plan as a document to file rather than a tool to use. Support workers who have not read the plan will not implement it.

A third mistake is choosing a practitioner without checking their experience with adolescents. A practitioner who works mostly with adults with intellectual disability will struggle with a 15 year old with trauma and autism.

A fourth mistake is not funding enough hours. A quality assessment plus initial plan development plus training and monitoring is often 40 to 80 hours of practitioner time in the first year. Underfunding this is false economy.

Action steps if you need PBS

Request behaviour support funding in the Behaviour Support budget (Improved Relationships on older plans) at your next plan review. Provide evidence of behaviours of concern, their impact, and previous interventions that have not worked. Ask for enough hours to cover a functional assessment plus initial plan development plus at least monthly review meetings for the first year.

Choose a practitioner whose experience fits the young person. For young people aged 12 to 20, ask about their work with adolescents and how they involve the young person in their own plan.

Frequently asked questions

How long does it take to develop a behaviour support plan? Six to twelve weeks for a functional assessment plus another two to four weeks to draft the plan. Longer for complex cases.

Does the young person have to agree to a behaviour support plan? The young person or their nominee must consent. Restrictive practices require additional formal authorisation.

Can any psychologist write an NDIS behaviour support plan? Not on their qualification alone. For NDIS-funded behaviour support, the practitioner needs to be approved by the NDIS Commission as a behaviour support practitioner, and plans that include regulated restrictive practices are lodged with the Commission.

Is PBS the same as counselling? No. Counselling is talking therapy. PBS is a structured framework for understanding and changing behaviour through environmental change, skill building, and quality of life improvement.

Are behaviour support plans mandatory? Only where regulated restrictive practices are used. Many young people benefit from a plan even without restrictive practices.

If you would like to discuss behaviour support for a young person aged 12 to 20 in Western Sydney, South West Sydney or the Illawarra, make a referral or call Supporting Communities Australia on 0480 800 521.