Functional Behaviour Assessment and Behaviour
A practical teacher's guide to Functional Behaviour Assessments (FBA) and Behaviour Intervention Plans (BIP): the ABC model, four functions of behaviour.
A Functional Behaviour Assessment (FBA) is a systematic process for identifying why a student engages in challenging behaviour. A Behaviour Intervention Plan (BIP) is the documented response to that assessment: a structured, evidence-based plan that replaces the problem behaviour with a more appropriate one. Both tools are rooted in applied behaviour analysis, and both are grounded in a straightforward premise. All behaviour serves a function for the person engaging in it. If you understand the function, you can teach a replacement.
Under the Individuals with Disabilities Education Act (IDEA) 2004, an FBA is legally required in specific circumstances, and school teams are expected to produce a BIP in response to the findings. But the legal requirement only scratches the surface of why these tools matter. For general education teachers, special education teachers, and school administrators, understanding FBA and BIP is increasingly central to effective classroom practice. Challenging behaviour is one of the most common reasons teachers report burnout. Yet most challenging behaviour is predictable, patterned, and responsive to function-based intervention.
Key Takeaways
- Understanding the function of challenging behaviour is paramount for effective intervention. A Functional Behaviour Assessment (FBA) systematically identifies the purpose a behaviour serves for a learner, such as gaining attention or escaping a task, as foundational research by Iwata, Dorsey, Slifer, Bauman, and Richman (1982) demonstrated. This understanding is crucial for designing a Behaviour Intervention Plan (BIP) that teaches a functionally equivalent, appropriate replacement behaviour.
- A robust Functional Behaviour Assessment (FBA) is a data-driven, systematic process, not merely an educated guess. Effective FBAs involve direct observation, interviews, and data collection to form a hypothesis about the behaviour's function, as advocated by leading experts like Sugai and Horner (2002). This systematic approach ensures interventions are precisely tailored to the learner's needs, moving beyond anecdotal evidence to inform practice.
- The efficacy of a Behaviour Intervention Plan (BIP) is directly dependent on the quality and accuracy of its preceding Functional Behaviour Assessment (FBA). A well-constructed BIP must directly address the identified function of the challenging behaviour, teaching and reinforcing appropriate replacement skills, a principle strongly supported by research in positive behaviour support (Carr et al., 1999). Interventions that are not functionally matched to the behaviour are unlikely to be effective or sustainable for learners.
- General education teachers play a crucial, active role in both the Functional Behaviour Assessment (FBA) and Behaviour Intervention Plan (BIP) processes. Their daily interactions provide invaluable contextual information and data for the FBA, and their consistent implementation of the BIP within the classroom is essential for its success, as highlighted by research on school-based behaviour support (Lane, O'Shaughnessy, & Lambros, 2013). Effective FBA and BIP require collaborative team efforts, integrating specialist knowledge with classroom expertise to support learners effectively.
What Is a Functional Behaviour Assessment?
A Functional Behaviour Assessment is a structured process for determining the environmental conditions that predict and maintain a student's challenging behaviour. The word "functional" is key: the assessment asks what function the behaviour serves for the student, not what the behaviour looks like from the outside.
The theoretical foundation is the ABC model, drawn from applied behaviour analysis (Cooper, Heron, and Heward, 2020). Every instance of behaviour is understood in relation to three elements. The Antecedent is what happens immediately before the behaviour: the classroom context, a task demand, a social interaction, a transition, or a sensory event. The Behaviour is the specific action itself, defined precisely enough that two observers would always agree whether it occurred. The Consequence is what happens immediately after, which reinforces or punishes the behaviour in ways that determine whether it recurs.
Iwata and colleagues (1982) formalised the functional analysis methodology, demonstrating that the same topography of behaviour (for example, self-injury) could serve completely different functions in different students. This insight transformed the field. Two students who both disrupt a lesson may be doing so for entirely different reasons, and an intervention that works for one may be ineffective or even counterproductive for the other.
The four functions of behaviour, often summarised with the acronym EATS, are:
- Escape: The student engages in the behaviour to get away from a demand, activity, person, or setting they find aversive.
- Attention: The student engages in the behaviour to gain social attention, including reprimands, from teachers or peers.
- Tangibles: The student engages in the behaviour to access or maintain a preferred object, activity, or food.
Sensory reinforcement happens when a learner enjoys internal stimulation from an action. This stimulation reinforces the behaviour, says researchers (e.g., researchers). Social consequences don't matter here.
Scott (2017) notes that escape and attention are the two most common functions in school settings, and that many teachers inadvertently reinforce both. When a student disrupts and is sent to the corridor, the escape function is reinforced. When a teacher responds to every outburst with visible attention, the attention function is reinforced. Function-based thinking asks: what is this student getting from this behaviour that they are not getting any other way?
When Is an FBA Required Under IDEA 2004?
IDEA 2004 specifies three situations in which a school must conduct an FBA. The first is when a student with a disability is subject to a change of placement as a result of behaviour. A change of placement occurs when a student is removed for more than ten consecutive school days or for a series of shorter removals that constitute a pattern. When this threshold is crossed, the team must convene a Manifestation Determination Review to decide whether the behaviour is related to the student's disability. If it is, the team must conduct an FBA and develop or review the BIP.
The second situation is when a student with a disability is placed in an alternative educational setting because they carried a weapon, possessed drugs, or caused serious bodily injury. The school must conduct an FBA regardless of whether a prior FBA exists.
The third situation is implicit in the broader IDEA framework: when a student's IEP team determines that behaviour is impeding the student's learning or the learning of others, the team must consider positive behavioural supports and strategies, which typically includes an FBA. OSEP guidance (2024) has emphasised that schools should not wait for a disciplinary crisis before conducting an FBA. A proactive FBA, conducted when a student first begins to display persistent challenging behaviour, produces better outcomes and avoids the legal pressures of reactive assessment.
The connection to a student's Individualised Education Programme matters here. The IEP team is responsible for the FBA and BIP process. General education teachers, who are legally required members of the IEP team, are essential participants, not passive recipients of a plan developed without them.
The Four Functions of Behaviour: A Comparison
Understanding the four functions in depth makes the difference between an FBA that produces meaningful intervention and one that generates paperwork. The table below compares each function with its typical triggers, examples in a secondary classroom, and the replacement behaviour direction a BIP should take.
| Function | What the student is seeking | Common antecedents | Classroom example | Replacement behaviour direction |
|---|---|---|---|---|
| Escape / Avoidance | To get away from or delay an aversive task, demand, or person | Long or difficult written tasks; transitions; peer conflict; test conditions; unfamiliar activities | Student tears up a worksheet when asked to begin an independent writing task | Teach the student to request a break appropriately, ask for help, or signal task difficulty using a card system |
| Attention | To gain adult or peer attention, including negative attention | Teacher focussed on another student; low-engagement whole-class activities; peer ignoring | Student calls out repeatedly during direct instruction, escalating until the teacher responds | Teach the student to raise their hand, use a check-in signal, or request peer interaction through structured routines |
| Tangibles / Access | To obtain or maintain a preferred item, activity, or privilege | Transition away from preferred activity; removal of object; denial of request | Student becomes physically aggressive when a peer uses the computer they want | Teach the student to request access, wait using a visual timer, or negotiate turn-taking through appropriate language |
| Sensory / Automatic | To produce, increase, or reduce internal sensory stimulation | Understimulating or overstimulating environments; unstructured time; specific textures, sounds, or lighting | Student rocks rhythmically and hums during whole-class silent reading, unresponsive to proximity prompts | Identify whether the behaviour interferes with learning or safety, then provide alternative sensory input that meets the same need (fidget tools, movement breaks, noise-cancelling equipment) |
The FBA Process Step by Step
Horner (2000) outlined five FBA stages: referral/consent, indirect assessment, direct observation, hypothesis formation and verification. These aren't just forms. Each stage gives information which shapes what you do next.
Stage 1: Referral and Consent
The process begins when a concern is formally raised, usually through an IEP team meeting or a referral from the classroom teacher. Parental consent is required before assessment begins. This stage also involves defining the target behaviour with precision. "He's challenging" is not a workable definition. "He shouts out words or phrases louder than conversation volume during teacher-directed instruction, averaging four to six times per 45-minute lesson" is. Operational definitions are the foundation of reliable data collection.
Stage 2: Indirect Assessment
Indirect assessment gathers behaviour information without direct observation. Teachers, specialists, parents, and learners may be interviewed. O'Neill et al.'s (1997) Functional Assessment Interview (FAI) offers a framework. It systematically gathers antecedent and consequence details.
Record review is also part of indirect assessment. Cumulative records, previous IEPs, attendance data, medical information, and any prior behaviour documentation can reveal patterns that observation alone might miss. Setting events, conditions that make problem behaviour more likely without being the immediate trigger, are often uncovered at this stage. A student who is consistently more dysregulated on Mondays following an unsettled weekend, or during the lesson that follows a chaotic transition, is showing you a setting event.
Stage 3: Direct Observation
Direct observation is the most important stage of the FBA. The assessor observes the student in the natural environment, recording the antecedents, behaviours, and consequences as they occur. Several tools support this.
ABC recording describes behaviour events in sequence. Scatter plots map behaviour across days, revealing patterns (Cooper et al., 2020). Interval and frequency recordings show how often behaviour happens (Alberto & Troutman, 2017; Horner et al., 2015). This gives quantitative data for each learner.
Horner (2000) recommends observing across at least three to five different settings and conditions to build a reliable picture of when behaviour is most and least likely. A student who is only observed during maths lessons will produce an assessment that may attribute the problem to the subject, when the real trigger is the seating arrangement, the noise level, or the proximity of a specific peer.
Stage 4: Hypothesis Formation
"In the presence of X, the learner will exhibit Y, resulting in Z" (Cooper et al., 2020). Antecedents, behaviour, and consequences link in this statement. Researchers such as Alberto & Troutman (2013) show its value. Use this structure to create clear hypotheses.
Operant conditioning, described by Skinner (1953), explains behaviour. A learner does something when something else happens first. Then, if the consequence is good, the learner does it again. This is also reinforcement, according to researchers like Thorndike (1911).
For example: "When Ms. Rivera asks the class to begin independent written work, Marcus covers his worksheet with his arm and begins making loud siren noises, and as a result he is typically sent to the corridor or asked to complete a modified task, which removes the writing demand."
This hypothesis points directly at both the function (escape from written work) and the maintaining consequence (removal of the demand). It also identifies what the intervention must address: the written work itself, the student's capacity to manage it, and the way the team currently responds.
Stage 5: Hypothesis Verification
The team checks the hypothesis before the BIP. This may involve structured observation to test predicted conditions. More complex cases might use functional analysis, as Iwata et al. (1982) created. Functional analysis is rigorous but needs expertise. School FBAs usually verify with observation and team data review.
From FBA to BIP: How Assessment Drives Intervention
The Behaviour Intervention Plan is the direct product of the FBA. It is not a generic behaviour contract or a list of consequences. Every element of the BIP should trace back to the function identified in the assessment. Carr (1977) established the foundational principle: if behaviour is communication, the intervention must teach an alternative form of communication that serves the same function.
This principle, later extended into the Communication-Based Intervention model (Carr and Durand, 1985), has three practical implications for the BIP. First, the replacement behaviour must be functionally equivalent. It must get the student the same outcome (escape, attention, access, or sensory input) that the problem behaviour was getting. Second, the replacement behaviour must be more efficient than the problem behaviour. If it is harder, slower, or less reliable at producing the desired outcome, the student will revert to the problem behaviour. Third, the environment must be modified to make the problem behaviour less necessary and the replacement behaviour more successful.
For a student whose escape-motivated behaviour is triggered by long written tasks, a BIP that only punishes disruption misses the point entirely. The effective BIP modifies the task (chunked instructions, graphic organisers, choice of response format), teaches the student to request breaks or help appropriately, and responds to appropriate requests immediately and reliably. The challenging behaviour is no longer necessary because the replacement behaviour works.
Writing an Effective BIP
Sugai and Horner (2002) outlined the components of an evidence-based BIP. A complete plan includes all of the following elements, each directly linked to the FBA findings.
Operationally Defined Target Behaviour. The exact behaviour that is being addressed, described in observable and measurable terms. Two staff members should be able to read the definition and agree whether the behaviour is occurring.
Function Statement. A summary of the FBA findings: the antecedent conditions, the maintaining function, and the consequence that currently reinforces the behaviour. This is the hypothesis statement in accessible language.
Replacement Behaviour. The specific behaviour the student will learn to use instead of the problem behaviour. It must serve the same function, be physically possible for the student, and be socially acceptable in the school setting.
Antecedent modifications are changes to routines that prevent problem behaviour. These are preventative strategies. For example, pre-teach vocabulary (Kern & Clemens, 2007). Visual schedules reduce anxiety (Carr, 1977). Offer preferred seating or use first-then boards to clarify tasks (Alberto & Troutman, 2006).
Teaching Strategies. The instructional methods the team will use to teach the replacement behaviour. This includes who will teach it, when, how often, and in what context. Scaffolding is often central to this phase: the student needs guided practice in using the replacement behaviour before being expected to use it independently under pressure.
Reinforcement Strategies. The plan must specify what reinforcement the student will receive for using the replacement behaviour, how quickly it will be delivered, and at what rate. The reinforcement must be more potent than whatever the problem behaviour was producing. For an escape-motivated student, this means that appropriate requests for breaks are honoured immediately and reliably.
Consequence Procedures. What staff will do when the problem behaviour occurs despite the other elements of the plan. These consequences should be calm, predictable, and designed not to reinforce the function. For attention-maintained behaviour, this means minimising social attention during the behaviour while increasing it at all other times.
Crisis Protocol. A clear plan for what staff should do if the behaviour escalates to a level that poses a safety risk. This section should specify who to contact, what physical space the student should move to, and what de-escalation approaches to use.
Data Collection Plan. How progress will be monitored, by whom, how frequently, and what the criteria for success look like. Without data, the team cannot know whether the BIP is working or whether it needs to be modified.
The General Education Teacher's Role in FBA and BIP
General education teachers are not peripheral to this process. In many cases, they are the most important people in it. The classroom teacher typically provides the first and most detailed account of the antecedent conditions, the frequency of the behaviour, and the patterns that emerge across the school day. Their classroom is where most implementation will occur.
During the FBA, you will be asked to complete structured interview forms, provide lesson-by-lesson ABC data, and participate in team meetings. The quality of your observational data directly affects the quality of the hypothesis. A common mistake is to describe behaviour in inferential terms ("he's being defiant", "she doesn't care") rather than observable ones. Train yourself to describe what you see: "He placed his head on the desk, said nothing, and did not begin the task."
When the BIP is developed, you are responsible for implementing it consistently during your lessons. This is not optional: inconsistent implementation is the most common reason BIPs fail (Scott, 2017). If the plan specifies that appropriate break requests are honoured within thirty seconds, every staff member who works with that student must honour them within thirty seconds. A single inconsistency teaches the student that persistence pays off.
You also have a role in progress monitoring. Many BIPs include frequency counts or brief rating scales that classroom teachers complete at the end of each lesson or day. This data is what allows the team to make decisions: is the replacement behaviour being used more often? Is the problem behaviour decreasing? Does the plan need to be adjusted?
Consider a concrete example. A year nine student, Jordan, has an FBA that identifies escape from written work as the maintaining function. The BIP includes a task-modification protocol (Jordan receives written tasks in three clearly sequenced chunks rather than one long worksheet), a card system (Jordan can place a red card on the desk to signal "I need help" without interrupting the class), and a reinforcement schedule (Jordan earns five minutes of preferred reading time at the end of lessons where the problem behaviour does not occur).
As the class teacher, your role is to prepare the chunked tasks before each lesson, respond to the red card within a specified time (the BIP says two minutes), and record whether Jordan used the card and whether the problem behaviour occurred. You do not need to be a behaviour specialist. You need to understand why the plan is structured this way and implement it as written.
Common Mistakes in FBA and BIP Implementation
The research literature on FBA and BIP implementation identifies several recurring failures. Understanding them helps you avoid them.
Treating behaviour as willful. The most persistent error in school-based behaviour management is interpreting challenging behaviour as a deliberate choice made by a student who knows better and refuses to comply. Cooper, Heron, and Heward (2020) are clear on this point: behaviour is shaped by its history of consequences, not primarily by intention. A student who disrupts every time written work is presented has learned, through repeated experience, that disruption works. The intervention must teach a better way to meet the need, not simply punish the expression of it.
Targeting the wrong behaviour. FBAs sometimes produce BIPs that address the topography of behaviour (what it looks like) rather than the function (what it achieves). A plan that addresses "shouting out" by teaching a student not to shout will not generalise to other forms of attention-seeking behaviour. The plan must address the function.
Inconsistent implementation. Scott (2017) found that implementation fidelity is the single biggest predictor of BIP effectiveness. A plan that is implemented by some staff but not others, or followed on some days but not others, teaches the student that escalation is the route to a more reliable outcome.
Failing to train all staff. Every adult who interacts with the student during the school day needs to understand the BIP: the lunchroom supervisor, the teaching assistant, the cover teacher, the school counsellor. A behaviour plan that only the SPED teacher knows about is not a behaviour plan. It is documentation.
Ignoring setting events. A setting event is a condition that occurs earlier in the day or in the student's life and makes problem behaviour more likely without being the immediate trigger. Common setting events include sleep deprivation, a difficult morning routine, medication timing, a conflict that occurred before school, or a chaotic transition earlier in the day. The BIP should include strategies for responding when known setting events are present, such as a brief check-in with a trusted adult at the start of the day.
Punishments like detentions may briefly stop behaviour. They don't teach learners what *to* do instead. Sugai and Horner (2002) found punishments can worsen avoidance behaviour. Learners might try harder to dodge demands to escape negative consequences.
Not updating the plan. A BIP that was written two years ago and has not been reviewed is almost certainly not addressing current antecedent conditions, staff configurations, or the student's developmental progress. IDEA requires annual review through the IEP process, but effective teams review BIPs more frequently when data suggests the plan is not working.
FBA and BIP Within the MTSS Framework
The Multi-Tiered System of Supports framework situates FBA and BIP within a three-tier continuum of behaviour support. Understanding this connection helps teachers see the FBA not as a crisis response but as a routine part of a well-structured school.
Tier 1 gives all learners universal behaviour support. Schools teach clear expectations and use acknowledgement systems. Routines are predictable; teachers proactively manage classrooms. Sugai and Horner (2002) found Tier 1 meets around 80 percent of learner needs.
Tier 2 provides targeted support for students who do not respond adequately to Tier 1. Interventions at this level are typically group-based, brief, and standardised: Check-In Check-Out (CICO), social skills groups, function-based group contingencies. Data from Tier 2 monitoring often informs a decision about whether to conduct an FBA. A student who has not responded to two Tier 2 interventions after six to eight weeks of consistent implementation is a strong candidate for individual FBA and BIP.
Tier 3 is where the individual FBA and BIP sit. By the time a student reaches Tier 3, the team has data from universal screening, Tier 1 and Tier 2 implementation, and monitoring over time. The FBA at Tier 3 is more thorough and the BIP more individualised than anything that occurs at earlier tiers. It is also embedded in the student's IEP if they have one.
The PBIS framework developed by Sugai, Horner, and colleagues (1999) provides the school-wide structure within which FBA and BIP operate most effectively. Schools that implement PBIS with fidelity report fewer discipline referrals, fewer out-of-school suspensions, and better outcomes for students with disabilities. The FBA and BIP are the clinical precision instruments at the top of the PBIS pyramid, not replacements for the universal systems beneath them.
FBA, BIP and Students with ADHD or Autism
Functional behaviour assessments need care for learners with ADHD, autism, or PDA (O'Neill et al., 2020). Neurodevelopmental differences and behaviour functions have a complex link (Cooper et al., 2007).
Students with ADHD frequently present with behaviours that serve an escape function, not because they dislike the task, but because executive function demands make task initiation and sustained attention effortful. A student who disrupts during independent work may be escaping cognitive load rather than the subject matter itself. The BIP in this case must address the cognitive demands of the task, not just the behaviour.
Learners with autism may show sensory behaviour read as seeking attention or escape. Stimming is internally pleasing, but often targeted by ineffective interventions. These aim to stop behaviour without offering other sensory outlets. FBA must consider the sensory context, like classroom acoustics and lighting (Kern et al., 2007).
For students with Section 504 accommodations, a formal FBA is not legally required. However, the principles of function-based assessment apply equally. Understanding why a student's behaviour is occurring is always more useful than simply managing the surface presentation.
The Role of Self-Regulation and Working Memory in BIP Design
Effective BIP design requires attention to the underlying cognitive capacities that affect a student's ability to use replacement behaviours. A student who cannot inhibit an impulse, shift attention, or hold a rule in mind while under stress will struggle to use a replacement behaviour at the exact moment it is most needed.
Baddeley (2012) found learners with less working memory react more to immediate situations. For behaviour plans, reinforce replacement behaviour quickly. Prompts must be external and visible, not internal self-monitoring. Ensure learners practise the simple replacement behaviour in low-stress situations first.
Self-regulation development, as described by Vygotsky's framework of internalising external supports, provides a useful model for BIP progression. Early in implementation, the student relies on external prompts: the red card on the desk, the teacher's proximity, the visual schedule. Over time, if the BIP is designed with development in mind, these external supports are gradually faded as the student internalises the replacement behaviour. A BIP that has no plan for fading supports is not preparing the student for greater independence.
Progress Monitoring and BIP Review
Data collection turns a BIP into a real intervention. Progress monitoring answers key questions. Is the replacement behaviour growing, asks Kern et al. (2007)? Is the problem behaviour declining, suggest Sugai et al. (2000)? Are antecedent changes working, as discussed by Cooper et al. (2020)?
Frequency data, the count of how often a behaviour occurs per unit of time, is the simplest and most practical measure for classroom teachers to collect. A brief tally in a notebook or on a sticky note, transferred to a tracking sheet at the end of the lesson, is sufficient for most BIPs. Duration data records how long each episode lasts. Intensity ratings, using a three or five-point scale, can capture whether behaviour severity is changing even if frequency remains constant.
Formative assessment principles apply equally to behaviour data as to academic data. Data collected daily is more useful than data collected weekly. Graphic displays of trend lines allow teams to see whether the plan is working far more clearly than raw numbers. A team that reviews a graph showing twelve weeks of data is far better positioned to make intervention decisions than a team working from impressions and memory.
When data shows the BIP is not working, the team must examine implementation fidelity before concluding the plan is wrong. Scott (2017) found that in the majority of cases where BIPs appear to fail, the plan was not being implemented consistently. The first question is always: is the plan being followed as written? Only then does the team ask: does the plan need to change?
What the Evidence Base Tells Us About FBA Effectiveness
Function-based intervention works well. Carr and Durand (1985) found learners requested attention appropriately and reduced problem behaviour. This was faster and more lasting than just managing consequences. Meta-analyses show function-based interventions work better than others for learners with difficult behaviour.
For further reading on this topic, explore our guide to Zones of Regulation.
For further reading on this topic, explore our guide to Conners Rating Scale.
Cook et al.'s (2015) review of 79 studies showed function-based interventions worked better. Interventions outperformed those not using Functional Behaviour Assessment. They found bigger effects when replacement behaviours matched the original function. Modifying antecedents with consequence strategies also improved results.
Scott (2017) conducted extensive work on FBA implementation in public schools and identified the gap between FBA quality in research settings and the quality achievable in typical schools. His practical framework emphasises that school-based FBAs need not match the rigour of clinical functional analysis to be useful. A well-conducted school-based FBA using interviews, records, and structured observation is sufficient to generate a useful hypothesis in most cases.
This is crucial for behaviour change. Rosenshine (2012) said direct teaching works well, fitting with replacement behaviours. Teach the learner the new behaviour with modelling and practice. Give feedback straight away; do not just tell them what to do.
Connecting FBA and BIP to Differentiated Practice
The FBA and BIP framework has direct implications for how teachers plan lessons for students with behaviour support needs. Differentiation of the task itself is frequently the most powerful antecedent modification available to the classroom teacher.
For escape-motivated students, the most effective antecedent modifications adjust the difficulty, length, and format of tasks to match the student's current capacity. This does not mean reducing expectations permanently. It means scaffolding the student into the expected level of challenge in a way that does not trigger escape behaviour before the student has a chance to succeed. Understanding child development theory provides useful context for calibrating these adjustments to the student's stage of development.
For learners seeking attention, social group tasks help avoid negative behaviours. Partner work, peer discussion and teacher check-ins offer positive connection. This gives learners attention without disruption, (Kern & Clemens, 2007). Schools need clear SEND systems to support behaviour plans, (Lewis & Sugai, 1999). Teachers should understand this support.
The key insight is that many antecedent modifications in a BIP are simply good teaching practice. Chunking tasks, providing clear visual instructions, offering choice of response format, building in movement breaks, using pre-correction before transitions: these are strategies that benefit all students and are essential for students with behaviour support needs. The BIP formalises and prioritises these practices for a specific student, but they belong in every classroom.
Try the ABC Data Matcher
This interactive tool helps teachers identify why a learner behaves a certain way. You will receive advice using evidence, including scripts and prevention strategies. (Kazdin, 2005; Carr & Durand, 1985) The tool processes everything in your browser. We collect no learner data.
Frequently Asked Questions
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What is a Functional Behaviour Assessment in education?
A Functional Behaviour Assessment is a structured process used to identify the underlying reasons why a student engages in challenging behaviour. Instead of just looking at what the behaviour is, it examines the environmental triggers and consequences that maintain it. This helps educators understand if the student is seeking attention, escaping a task, accessing a tangible item, or fulfilling a sensory need.
How do teachers implement a Behaviour Intervention Plan in the classroom?
Teachers implement a Behaviour Intervention Plan by changing the classroom environment to prevent triggers and actively teaching a replacement behaviour. They must provide consistent reinforcement when the student uses the new skill instead of the challenging action. General education teachers play a vital role by taking data and ensuring the plan is applied consistently during daily lessons.
What are the benefits of using an FBA for challenging behaviour?
The primary benefit of an FBA is that it stops teachers from guessing why a student acts out and provides a clear, evidence-based reason. By identifying the specific function of the behaviour, schools can create targeted interventions that actually work. This proactive approach reduces classroom disruptions and significantly lowers the risk of teacher burnout.
What does the research say about the ABC model of behaviour?
Research in applied behaviour analysis shows that all human actions are shaped by their antecedents and consequences. Studies confirm that understanding what happens immediately before and after a behaviour is the most reliable way to predict and change it. This model proves that the same challenging action can serve entirely different functions for different students.
What are common mistakes when conducting a Functional Behaviour Assessment?
A frequent mistake is focusing only on the consequences of a behaviour while ignoring the antecedent triggers that set it off. Another common error is failing to teach a functional replacement skill, leaving the student with no appropriate way to meet their needs. Finally, plans often fail when classroom teachers are not given the training or time to implement the strategies consistently.
When is an FBA legally required for a student?
Under current legal guidelines, a school must conduct an FBA when a student with a disability faces a change of educational placement due to disciplinary actions. This includes suspensions lasting more than ten consecutive school days or a pattern of shorter removals. It is also required if a student is moved to an alternative setting for serious offences involving weapons or drugs.
Further Reading
Key Research Papers on Functional Behaviour Assessment and Behaviour Intervention Plans
The five studies below represent the foundational and applied research base for function-based behaviour support in school settings. Each is cited in peer-reviewed literature and directly informs current IDEA-compliant practice.
Toward a Functional Analysis of Self-Injury View study
Iwata, B. A., Dorsey, M. F., Slifer, K. J., Bauman, K. E., and Richman, G. S. (1994/original 1982). 3,213 citations.
Iwata et al. (1994) showed self-injury has varied causes. This work changed how schools view behaviour. We now see it as communication, not just a problem (Iwata et al., 1994). Current functional behaviour assessments stem from this research.
Reduction of Severely Challenging behaviours of Young Autistic Children: The Effects of Teaching Functionally Equivalent Alternative behaviours View study
Carr, E. G., and Durand, V. M. (1985). Journal of Applied behaviour Analysis, 18(2), 131-144. 3,200+ citations.
Carr and Durand (1985) found communication training helped learners request attention or escape situations. This reduced problem behaviour more effectively than punishment or extinction alone. Their research underpins replacement behaviours in modern behaviour intervention plans. It showed functionally equivalent alternatives are crucial for good interventions.
Horner (2000) studied functional behaviour assessment in schools. The research informs how we develop better teaching methods. Read Horner's (2000) work in the Journal of Positive behaviour Interventions.
Horner's review of school-based FBA methodology provides a practical framework for conducting assessments within the constraints of public school settings. He distinguishes between the rigour achievable in clinical settings and the pragmatic approach required in schools, arguing convincingly that school-based FBAs conducted through interviews, records, and structured observation are sufficient to generate valid hypotheses in most cases. Directly relevant to any teacher working within an IEP team.
Function-Based Support Versus Non-Function-Based Support for School-Based Problem behaviour: A Meta-Analysis View study
Cook, C. R., Volpe, R. J., and Livanis, A. (2015). Exceptional Children, 78(3), 265-281. 0 citations.
Newcomer and Lewis's (2004) meta-analysis showed function-based interventions work better. Function-based interventions had larger effects across 79 studies. Replacement behaviours and antecedent changes boosted success the most. This research gives teachers data showing function-based interventions improve outcomes.
Positive behaviour Support: Including People with Difficult behaviour in the Community View study
Sugai, G., and Horner, R. H. (2002). Journal of Positive behaviour Interventions, 4(4), 212-227. 383 citations.
Sugai and Horner's framework for Positive Behaviour Support at the school and individual level remains the most widely implemented model of school-wide behaviour support in the United States. This paper outlines the components of an evidence-based BIP within a tiered system and makes the case for proactive, function-based approaches over reactive punishment. It provides the theoretical scaffolding for the MTSS tier structure within which school-based FBAs now operate.
Before the next lesson you teach a student with a documented BIP, read the plan and identify one specific antecedent modification you can implement today: a chunked task, a visual schedule, a check-in at the door, or a reliable break routine. Implementation begins with the small decisions you make before the lesson starts, not with what you do after the behaviour has already occurred.
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References
Baddeley, A. (2012). Working memory: Theories, models, and controversies. Annual Review of Psychology, 63, 1-29.
Carr, E. G. (1977). The motivation of self-injurious behaviour: A review of some hypotheses. Psychological Bulletin, 84(4), 800-816.
Carr, E. G., and Durand, V. M. (1985). Reduction of severely challenging behaviours of young autistic children: The effects of teaching functionally equivalent behaviours. Journal of Applied behaviour Analysis, 18(2), 131-144.
Cook, C. R., Volpe, R. J., and Livanis, A. (2015). Function-based support versus non-function-based support for school-based problem behaviour: A meta-analysis. Exceptional Children, 78(3), 265-281.
Cooper, J. O., Heron, T. E., and Heward, W. L. (2020). Applied behaviour Analysis (3rd ed.). Pearson.
Horner (2000) explored positive behaviour supports. His research appeared in Focus on Autism and Other Developmental Disabilities. The journal published it in 2000, volume 15(2), pages 97-105.
Individuals with Disabilities Education Act (IDEA), 20 U.S.C. §§ 1400 et seq. (2004).
Iwata, B. A., Dorsey, M. F., Slifer, K. J., Bauman, K. E., and Richman, G. S. (1994). Toward a functional analysis of self-injury. Journal of Applied behaviour Analysis, 27(2), 197-209. (Original work published 1982.)
O'Neill, R. E., Horner, R. H., Albin, R. W., Sprague, J. R., Storey, K., and Newton, J. S. (1997). Functional Assessment and Program Development for Problem behaviour: A Practical Handbook (2nd ed.). Brooks/Cole.
Function-based support helps learners with disabilities (OSEP, 2024). These approaches improve behaviour. They focus on why the behaviour happens. Teachers can then target specific needs.
Rosenshine, B. (2012). Principles of instruction: Research-based strategies that all teachers should know. American Educator, 36(1), 12-19.
Scott, T. M. (2017). Teaching behaviour: Managing Classrooms Through Effective Instruction. Corwin.
Sugai, G., and Horner, R. H. (2002). Introduction to the special series on positive behaviour support in schools. Journal of Emotional and behavioural Disorders, 10(3), 130-135.
Sugai, G., Horner, R. H., Dunlap, G., Hieneman, M., Lewis, T. J., Nelson, C. M., and Ruef, M. (1999). Applying positive behavioural support and functional behavioural assessment in schools. Journal of Positive behaviour Interventions, 2(3), 131-143.
