Understanding Behaviour Difficulty in Children with Disabilities

When a child repeatedly bangs their head against a wall, throws uncontrollable tantrums well past the toddler years, or refuses to sleep night after night, parents and educators often find themselves asking: is this behaviour a problem, or is it part of the child’s disability? This question sits at the heart of understanding behaviour difficulty – a concept that is essential for anyone supporting children with intellectual disabilities and autism. Getting the definition right matters enormously, because how we label a behaviour shapes how we respond to it.

What is a behaviour difficulty? 🔗

A behaviour difficulty – also referred to as a problem behaviour or challenging behaviour – is any action that is unacceptable for a child’s age or that is clearly inappropriate for the time and place. More precisely, these are maladaptive behaviours: patterns of action that interfere with a child’s growth, learning, and ability to participate in everyday social life.

Consider a child like Bharati, a 9-year-old with both an intellectual disability and autism. Bharati screams and hits herself when her daily routine is changed unexpectedly, refuses to sit with other children during school activities, and frequently rocks back and forth so intensely that she injures herself. Each of these actions, taken individually, might seem like a quirk of her condition. But together – and assessed against clear criteria – they represent genuine behaviour difficulties that require attention and support.

It is important to note that the term “challenging behaviour” was specifically chosen in the professional literature to move away from purely deficit-based labels. Research has shown that these behaviours, while deeply disruptive, are often quite functional for the child – they may be the only way the child knows how to communicate unmet needs, express distress, or escape an overwhelming situation. This does not make them acceptable or harmless, but it does change how we understand and respond to them.

Children and adolescents with intellectual disabilities are at significantly increased risk of developing challenging behaviours compared to their typically developing peers. When a child also has a co-occurring diagnosis such as autism spectrum disorder, that risk rises further – research consistently shows that children with both intellectual disability and autism display considerably more challenging behaviours than those with intellectual disability alone.

The three criteria for identifying a true behaviour difficulty 🔗

Not every unusual or disruptive action a child displays qualifies as a behaviour difficulty. For a behaviour to be formally assessed as problematic, it must meet at least one of three specific criteria. These criteria provide a consistent and fair framework for assessment, ensuring that children are neither over-pathologised nor left without needed support.

Criterion 1: The behaviour harms the child’s own development or adjustment 🔗

The first criterion asks whether the behaviour is actively getting in the way of the child’s own growth, learning, or social adjustment. If a child’s actions prevent them from acquiring skills, building relationships, or participating in daily routines, that behaviour is a difficulty – regardless of whether it disturbs anyone else.

For example, a child who persistently refuses to engage in any group activity at school is not just being shy. If this avoidance is consistent and severe, it prevents the child from developing social skills, learning from peers, and achieving developmental milestones. Clinically, challenging behaviour is understood as persistent and pervasive maladaptive behaviour that has a significant adverse effect on the quality of life and health of the individual. When a behaviour consistently blocks a child’s development, it meets this first criterion.

Criterion 2: The behaviour interferes with other people’s rights 🔗

The second criterion focuses on the child’s social environment. A behaviour crosses the line when it regularly violates or disrupts the rights and wellbeing of others – classmates, teachers, family members, or caregivers. This includes physical aggression, property destruction, and actions that make shared spaces unsafe or inaccessible for others.

Problem behaviour such as aggression towards others – including hitting, kicking, biting, and scratching – is among the most commonly reported challenges in children with autism and intellectual disability. When a child’s behaviour regularly puts classmates at risk or forces a teacher to spend the entire lesson managing one child at the expense of everyone else, it clearly interferes with other people’s rights and meets this criterion.

It is also worth noting that this criterion extends beyond physical harm. Persistent screaming, throwing objects, or destroying classroom materials can significantly limit another child’s ability to learn and feel safe – even without direct physical contact.

Criterion 3: The behaviour’s frequency, duration, or intensity falls outside acceptable limits 🔗

The third criterion is perhaps the most nuanced. It recognises that almost any behaviour can become a difficulty if it happens too often, lasts too long, or is too severe. This is why frequency, duration, and intensity are the core dimensions used in professional assessment of challenging behaviour.

Clinicians track these dimensions carefully – for instance, using continuous recording to count how often a behaviour occurs, and duration recording to measure the total time a child spends engaged in it during an observation period. A tantrum that lasts 5 minutes and happens once a week is very different from one that lasts 45 minutes and happens multiple times a day.

To give a practical example: difficult behaviour that frequently lasts longer than 15 minutes, occurs more than three times a day, or is more aggressive than typical may indicate that a child has an underlying issue that needs attention and goes well beyond normal developmental tantrums. Context and developmental stage matter here too – what is typical for a 2-year-old is not typical for a 9-year-old, and what is acceptable at home may be completely inappropriate in a classroom.

This three-part framework ensures that teachers, parents, and clinicians are all asking the same questions when they assess a child’s behaviour – making it less likely that a genuine difficulty goes unnoticed or that normal childhood behaviour gets mislabelled as a problem.

Common examples of difficult behaviours in children with disabilities 🔗

Behaviour difficulties in children with intellectual disabilities are not rare. These behaviours are often chronic, and more than one may be present in the same child. The following are the most frequently encountered forms, each of which can meet one or more of the three criteria above.

Temper tantrums 🔗

While tantrums are a normal part of early childhood, they become a difficulty when they extend well beyond the typical developmental period or occur with unusual frequency and intensity. In children with autism and intellectual disability, meltdowns can last far longer than typical tantrums, sometimes occurring more than ten times a day, and are often triggered by sensory overload, changes in routine, or an inability to communicate needs – rather than by a simple denied request. Unlike a typical tantrum, these episodes are not goal-directed and are much harder for the child to control.

Self-injurious behaviour: head banging and self-harm 🔗

Self-injurious behaviour (SIB) refers to any action through which a child deliberately harms their own body. This includes head banging, skin picking, self-biting, and hitting oneself – behaviours that are both alarming for caregivers and harmful to the child. The prevalence of self-injurious behaviour among children with autism has been estimated to exceed 28%. These behaviours often emerge as a way to self-regulate overwhelming sensory experiences or to communicate distress, and they clearly meet the first criterion – direct harm to the child’s own wellbeing.

Aggressiveness 🔗

Physical and verbal aggression towards others is one of the most frequently reported behaviour difficulties in children with intellectual disabilities and autism. Common forms include hitting, biting, kicking, throwing objects, and verbal threats – behaviours that endanger others and often disrupt family and classroom life significantly. The intensity of physical aggression in individuals with autism tends to increase from childhood through to adolescence, making early identification and intervention especially important.

Extreme fearfulness 🔗

While fear is a normal human response, some children with intellectual disabilities experience fears that are so intense, persistent, and pervasive that they severely restrict daily life. A child who is so fearful of a specific sound, texture, or environment that they cannot attend school, eat normally, or be around other people is displaying a behaviour difficulty. Anxiety disorders occur in 20-35% of children with intellectual disability, at three to five times the rate seen in the general population, and extreme fearfulness is often intertwined with these anxiety presentations. When fear prevents normal participation in life, it clearly hinders the child’s development.

Bedwetting (enuresis) 🔗

Bedwetting, or nocturnal enuresis, is considered a behaviour difficulty when it persists significantly beyond the age at which a child would typically be expected to have bladder control. While it is not disruptive in the same way as aggression, it does affect the child’s social inclusion, self-esteem, and participation in activities like school trips or overnight visits. For a child who is already socially isolated because of a disability, the added stigma of bedwetting can compound developmental and social difficulties considerably.

Stereotyped and disruptive behaviours 🔗

This category includes actions like persistent rocking, hand-flapping, repetitive vocalising, and property destruction. Challenging behaviour broadly includes aggression, self-injury, destructiveness, overactivity, and bizarre mannerisms. These behaviours may be self-soothing for the child but can become a difficulty when their frequency and intensity prevent the child from engaging in learning activities or when they put the child or others at risk.

Why labelling matters – and what it means for intervention 🔗

Identifying a behaviour as a “difficulty” is not about judging a child or assigning blame. It is a clinical and educational tool that opens the door to structured, evidence-based support. Challenging behaviour is often an attempt to communicate unmet needs, and strategies that are proactive and flexible in addressing those needs are essential. Until a behaviour is clearly identified as a difficulty – and assessed against the three criteria – it is impossible to design an appropriate intervention plan.

For educators and parents, the key takeaway is this: when a child’s behaviour harms their own development, disrupts the rights of others, or falls well outside the normal range in terms of how often it happens, how long it lasts, or how severe it is – it deserves a formal, supportive response. Not punishment. Not dismissal. A response built on understanding why the behaviour is happening and what the child is trying to communicate through it.

What do you think? If a child’s behaviour clearly meets one of the three criteria but teachers and parents disagree about whether it is a “real” problem, how should schools navigate that difference? And given that so many difficult behaviours serve a communicative purpose, what might schools do differently to ensure children with intellectual disabilities have better ways to express their needs before the behaviour escalates?

References

1. https://www.ncbi.nlm.nih.gov/books/NBK355392/
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