How Functional Assessments Shape Effective PBS in Supported Living
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Functional assessment sits at the heart of Positive Behaviour Support (PBS). Without it, Supported Living teams can only guess what a person needs — and guessed strategies rarely work. For more detail on proactive PBS approaches, see Proactive Support Strategies and Understanding Behaviour.
Why functional assessment matters
A functional assessment identifies the purpose a behaviour serves for the person. Once the function is understood, the provider can design personalised environments, routines and communication supports that prevent escalation and improve quality of life.
1. Gathering meaningful information
- Direct observation in different settings and times of day.
- Input from family, previous providers and MDT professionals.
- Review of incident forms and patterns over time.
- Understanding sensory sensitivities and triggers.
2. Identifying behavioural functions
Most behaviours link to one or more functions:
- Escape/avoidance (e.g., overwhelming demands or noise)
- Access to something (preferred activity, object or food)
- Social connection (attention, reassurance, proximity)
- Sensory regulation (movement, pressure, repetitive actions)
3. Designing the PBS plan around the function
- Create routines that minimise triggers and maximise coping strategies.
- Introduce skill-building activities that replace behaviours of concern.
- Ensure staff respond consistently so the behaviour no longer “works”.
- Adapt the environment — lighting, noise, predictability, space.
4. Linking assessment to staffing and risk
- Staffing ratios should be based on the function of behaviour, not just levels of need.
- Risk management becomes proactive rather than reactive.
- Commissioners value clarity on why ratios are required and how they will step down safely.
5. Reviewing and refining
Functional assessments are not one-off exercises. They must be:
- updated following major life events,
- reviewed when incidents reduce or increase,
- adapted as independence grows,
- linked to MDT and family feedback.
Done well, functional assessments become the engine of effective Supported Living — guiding everything from daily practice to long-term independence planning.
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