Reducing Behaviours That Challenge: Evidence-Based PBS Strategies

Evidence-based Positive Behaviour Support (PBS) strategies, applied consistently and with proper functional assessment, can reduce behaviour that challenges by up to 89% in structured intervention programmes. A 2021 longitudinal study by Action Behavior Centers found an 86% decrease in target behaviours across children receiving early intensive behavioural intervention, with 82% of that reduction achieved within the first year alone. These are not theoretical figures: they reflect what happens when practitioners understand the function of behaviour and respond proactively.

Why behaviour happens: understanding the function

Behaviour that challenges does not occur randomly. It serves a purpose for the person displaying it, and that purpose, once identified, becomes the starting point for every effective intervention. The four most common functions of behaviour that challenges are: seeking attention, escaping or avoiding a demand, accessing a tangible item or activity, and meeting a sensory need.

Without knowing the function, even well-intentioned responses can accidentally reinforce the behaviour they aim to reduce. A young person who hits out to escape a difficult task will not improve if the consequence is removal from that task: the behaviour has worked. Understanding function changes everything about how practitioners respond.

This is not just clinical theory. It is the practical foundation of Positive Behaviour Support training, and it is what separates PBS from traditional behaviour management approaches that focus on compliance rather than understanding.

Behaviour as communication

For many of the children and adults supported in residential care, schools, and community settings, behaviour that challenges is the clearest communication tool available to them. A child who bites during transitions may be communicating anxiety about unpredictability. A young person who destroys property during schoolwork may be communicating that the task feels impossible. Practitioners who respond to the communication, rather than just the behaviour, achieve fundamentally better outcomes.

Simon Gower, founder of ProActive Approaches and author of The Empathy Gap, draws on 30 years of experience in residential childcare to make this case: when staff understand why behaviour happens, their responses become more effective, more consistent, and less likely to escalate the situation.

Functional Behaviour Assessment: the ABC model in practice

Functional Behaviour Assessment (FBA) is the structured process used to identify the function of behaviour before writing any intervention plan. It uses the ABC model: Antecedents (what happened immediately before), Behaviour (a precise description of what occurred), and Consequences (what happened immediately after). Collected across multiple observations, ABC data reveals the patterns that maintain a behaviour.

NICE guideline NG11 (2015) recommends functional behavioural assessment as the first step for any person with a learning disability whose behaviour challenges. It is not optional or aspirational: it is the evidence-based standard. Without it, any PBS plan rests on guesswork.

How to conduct an FBA in your service

Start by gathering information from everyone who knows the person well: key workers, family members, teachers, and, where possible, the person themselves. Use structured observation forms to record ABC data across different times of day, settings, and staff. Look for patterns: does the behaviour increase at transitions? In noisy environments? When certain demands are made? When certain people are present?

Once patterns emerge, form a hypothesis about the function. Then test that hypothesis by making a targeted change and measuring what happens. If the behaviour decreases when you modify the antecedent, your hypothesis is likely correct. If not, reassess. FBA is an iterative process, not a one-time event.

Teams working with children affected by developmental trauma should note that trauma responses can complicate the ABC picture. A child's nervous system may respond to cues that are not obvious to observers. Trauma-informed practice training helps practitioners distinguish between function-driven behaviour and trauma-driven dysregulation, which require different responses.

Building PBS plans that staff actually use

A Positive Behaviour Support plan translates FBA findings into specific, individualised strategies. The best plans are written in plain language, short enough to be read before a shift, and clear about exactly what staff should do at each stage: before behaviour occurs, during it, and after. Long documents that gather dust in a filing cabinet help no one.

Effective PBS plans cover four areas: proactive strategies to reduce triggers, replacement skill teaching to give the person an alternative behaviour that meets the same function, reinforcement strategies to strengthen the replacement behaviour, and reactive strategies for when behaviour does occur. The first two areas carry the most weight: the goal is to prevent escalation, not just manage it.

Involving the whole team

Consistency is one of the most powerful variables in behaviour support. A plan implemented by some staff but not others, or applied differently across shifts, sends mixed messages that can inadvertently maintain the behaviour. Team training, clear written plans, and regular review meetings all contribute to the consistency that makes PBS plans effective rather than aspirational.

For children's residential services, where shift patterns mean a young person may interact with many different staff in a week, this is especially critical. Our programmes for children's residential services build this whole-team consistency from the ground up, ensuring that the approach is embedded in culture, not just binders.

Replacement skill teaching and functional communication training

Functional Communication Training (FCT) is one of the most robustly evidenced strategies in the behaviour support literature. The principle is straightforward: if a behaviour serves a communicative function (which most do), teach the person a more appropriate way to communicate the same need. A child who throws objects to escape demands can be taught to request a break. A young person who hits out for attention can be taught to initiate interaction verbally or through a symbol.

The 2021 Action Behavior Centers longitudinal study found a 97% decrease in property destruction and a 92% decrease in aggression among children receiving intensive behavioural intervention. FCT was a core component of those interventions. These are not marginal gains: they represent transformative changes in quality of life for the people supported and the staff working with them.

Teaching replacement skills effectively

Replacement skills must be easier to perform than the behaviour that challenges, and must be reinforced more reliably. If requesting a break takes three minutes and results in a vague response, but throwing a chair results in an immediate break, the throwing behaviour will persist. The replacement needs to work faster and more reliably than the behaviour that challenges it is replacing.

Practise replacement skills during calm, low-demand periods rather than waiting for escalation. Keep prompting consistent across staff. Reinforce immediately and enthusiastically. Fade prompts gradually as the skill becomes established. This is the patient, systematic work that produces lasting change.

If your service is building this kind of approach from scratch, our guide to proactive strategies in behaviour support sets out the foundational framework in practical terms.

Environmental design and proactive modification

Before reaching for individual intervention strategies, look at the environment. Many triggers for behaviour that challenges are environmental: noise levels, unpredictable transitions, lack of meaningful activity, cluttered spaces, or settings that provide no opportunity for choice or control. Addressing these upstream factors can reduce behaviour that challenges significantly without requiring any individual intervention at all.

Predictable routines reduce anxiety, particularly for people with autism or developmental trauma. Visual schedules, advance notice of transitions, and consistent structure give people the predictability they need to regulate. Calm zones or low-stimulation spaces provide an alternative to escalation. Offering genuine choices, even small ones, restores a sense of control that reduces the need to exert it through behaviour.

Noncontingent reinforcement as a preventive tool

Noncontingent reinforcement (NCR) involves providing access to preferred items, attention, or activities on a fixed schedule, before behaviour escalates. If a person's behaviour that challenges is maintained by attention, scheduled positive interactions throughout the day reduce the motivation to seek attention through challenging means. NCR is a simple, low-burden strategy with strong evidence for reducing behaviour maintained by attention and access functions.

Environmental design and NCR work best as part of a broader PBS plan rather than in isolation. They are most powerful when informed by FBA data about the specific triggers and functions relevant to the individual. Teams trained in de-escalation strategies will also recognise the value of environmental awareness in preventing escalation before it begins.

What the evidence says about outcomes

The research base for PBS and FBA-informed intervention is substantial. The 2021 Action Behavior Centers longitudinal study of 20 children with ASD receiving early intensive behavioural intervention for between 14 and 37 months found an 86% overall decrease in target behaviours, a 92% decrease in aggression, and a 97% decrease in property destruction. RightWay ABA cites an overall success rate of over 89% for ABA-based approaches in improving key developmental areas.Organisations using our programmes have documented up to an 80% reduction in incidents. Our training is certified against the Restraint Reduction Network Training Standards. Manchester Metropolitan University evaluated the RRN Training Standards as a national framework, not our programme directly. Organisations where our programme has been fully embedded have documented up to an 80% reduction in incidents. The RRN Training Standards evaluation provides independent university-level evidence of the framework our training is certified against.

NICE guideline NG11 (2015) provides the clinical framework: functional behavioural assessment, PBS plans, and environmental modification are recommended as the primary approach for people with learning disabilities whose behaviour challenges. This is the standard against which services are measured.

If your organisation wants to embed this approach across a service, our upcoming training events are a practical starting point. View current training dates and book a place.

Frequently asked questions

How quickly can we expect to see reductions in behaviour that challenges?

The 2021 Action Behavior Centers study found that 82% of the total behaviour reduction across the intervention period was achieved within the first year. However, that study involved intensive daily intervention. In residential and school settings with well-implemented PBS plans, meaningful reductions are typically visible within weeks of consistent implementation, though full embedding across a team takes longer. Consistency of approach across all staff is the single biggest determinant of speed.

Is PBS suitable for children affected by developmental trauma?

Yes, and the two approaches are complementary. PBS provides the structural framework for understanding and responding to behaviour, while trauma-informed practice helps staff understand why the nervous system responds as it does. Together, they equip practitioners to distinguish between behaviours that are function-driven and those that are trauma responses, and to adjust their approach accordingly. Our programmes integrate both frameworks rather than treating them as separate.

What is the difference between a PBS plan and a behaviour management plan?

A traditional behaviour management plan typically specifies how staff should respond once a behaviour has occurred. A PBS plan goes further: it includes proactive strategies to prevent behaviour, skill-teaching targets to give the person alternatives, environmental modifications, and reactive strategies as a final layer. PBS plans are also person-centred and function-based, meaning they are tailored to the individual rather than applying generic consequences.

Do we need a specialist to conduct an FBA?

A full FBA in complex cases may benefit from a specialist psychologist or behaviour analyst. However, many elements of functional assessment, including structured ABC observation, pattern analysis, and hypothesis testing, can be conducted by trained practitioners in the service. Building this capability within your team is one of the core aims of PBS training, and it is far more sustainable than relying on occasional specialist input.

How does BILD Act certification relate to PBS?

BILD Act (RRN) certification is the regulatory standard for training that includes physical intervention. Certified programmes must demonstrate that physical intervention sits within a PBS framework, is treated as a last resort, and is actively targeted for reduction. It is not simply a physical skills qualification: it is a commitment to the whole PBS approach, of which physical intervention is the smallest and final component.

Put evidence-based behaviour support into practice

Reducing behaviour that challenges by 80% or more is not an aspirational target. It is a documented outcome of well-implemented PBS, documented across UK services using ProActive Approaches' BILD Act certified training. The strategies are clear, the evidence base is strong, and the pathway from functional assessment to effective PBS plan is a learnable, teachable skill.

ProActive Approaches delivers BILD Act (RRN) certified training across children's residential services, schools, adult social care, and healthcare, built on 30 years of direct practice experience and a trauma-responsive framework that goes beyond standard PBS delivery.

View upcoming training dates or get in touch to discuss a programme for your organisation.