What is my child's behaviour telling me? A decoder for parents

A decoder cannot tell you what a child is thinking. It can slow the adult's thinking down enough to replace a label with a testable description.

Use the method after the incident, not while someone is in danger or overwhelmed.

Step 1: write only what happened

Describe what a camera and microphone would have recorded:

When Dad said, “Tea is ready,” Maya threw the controller onto the sofa, shouted “No”, kicked the door once and went into the bedroom.

Avoid “Maya had a tantrum because she wanted her own way.” Tantrum, wanted and own way are interpretations. They may shape every later answer before you have looked at the sequence.

Include duration, intensity and injury only when you can estimate them accurately. “Several minutes” is better than an invented exact time. Record what did not happen too: Maya threw towards the empty sofa, not at a person; she left rather than pursuing anyone.

Precise description is not cold. It protects the child from being turned into an adjective.

Step 2: look at the ten minutes before

Start close to the incident:

• What activity was underway?
• What changed?
• What was asked, by whom and in what form?
• What had the child already been managing?
• Was there warning or a visible endpoint?
• Who else was present?

For Maya: she had returned from school 20 minutes earlier, had not eaten, was playing an online game with other people and received one immediate instruction to stop.

Then note relevant wider context without making the page a life history: poor sleep, illness, medication change, examination week, a family disruption or several unusually demanding days.

NICE guidance on functional assessment recommends identifying events, times and situations that predict when behaviour occurs and when it does not across ordinary routines ^[1]. That guidance concerns people with learning disabilities whose behaviour challenges; a family worksheet is a lighter observation tool, not a clinical functional assessment.

Step 3: consider four kinds of pressure

Use four headings so one favourite explanation does not take over.

Body

Pain, illness, hunger, thirst, tiredness, constipation, needing the toilet, medication effects or hormonal change may alter behaviour. Oxford Health advises considering hidden discomfort when behaviour changes, particularly when a child cannot communicate it directly ^[3].

Surroundings

Consider sound, light, crowding, smell, temperature, touch, lack of movement, social uncertainty and whether the space allows a pause. The same request can be accessible in a quiet kitchen and impossible in a crowded changing room.

Communication

Did the child understand the words, sequence, timing and what was fixed? Could they express “not yet”, “help”, “it hurts”, “I need to finish this round” or “I cannot do both”? Speech does not guarantee that these messages are accessible under pressure.

Task

What skills did the demand require: stopping, starting, waiting, choosing, holding steps in mind, motor coordination, tolerating error or shifting attention? Ask whether the child had the skill and enough capacity to use it then.

NICE autism guidance includes communication, physical and mental health, sensory and social environment, changes and predictability among factors to assess ^[2]. The National Autistic Society also describes physical, sensory, communication, transition and unstructured-time contributors to distress ^[4]. Keep the population limits visible: these sources do not prove autism from the pattern.

Step 4: record what happened afterwards

What changed immediately after the behaviour?

• Did the demand stop, pause or become smaller?
• Did the room become quieter?
• Did an adult come close or move away?
• Did the child obtain an item, information, help or time?
• Did another task disappear?
• What happened to pain or sensory input?

After Maya left, the game ended, the request paused, the house became quieter and Dad brought food ten minutes later.

This does not mean Maya deliberately designed the behaviour to obtain all four results. Consequences can shape what becomes an effective route over time even when the first event arose from hunger, interruption or overload. Record the result without calling it a motive.

Also record the longer cost: shame, exhaustion, missed food, sibling fear, repair work or difficulty returning to the evening. A behaviour that creates immediate escape may still leave the child worse afterwards.

Step 5: write two possibilities

A useful hypothesis links the context, behaviour and result without claiming certainty:

Hunger and the unannounced end of an absorbing social game may have made switching to tea difficult. Leaving also reduced language and noise.

Write no more than two at first. Ten possible causes cannot guide one useful trial. Avoid diagnostic conclusions such as “This proves ADHD” or character judgements such as “She was controlling us.”

Ask what evidence would not fit your explanation. If Maya stops easily after a warning even when hungry, transition information may matter more than food. If the same pattern happens only during games with peers, the social endpoint may be central.

The child's account can replace the adult hypothesis:

I could not leave because my team would lose points. I shouted because nobody listened when I said the match had four minutes left.

Do not require this insight immediately after the event. Offer conversation, writing, drawing or choices later.

Step 6: choose one small change

Change the lead-up, surroundings or request rather than demanding that the child prove the theory.

For Maya, the family might try:

• food before starting an online match after school;
• checking the match endpoint before announcing tea;
• a ten-minute and two-minute warning;
• an agreed sentence or signal for one bounded extension; or
• moving the first conversation out of a noisy room.

Choose one or a small coherent pair. If everything changes, you will know only that the evening was different.

Keep necessary limits honest. If the family must leave at six, do not offer a delay that is unavailable. A decoder improves delivery; it does not turn fixed realities into false choices.

Invite the child to reject the adult's theory. "I wondered whether the noise made stopping harder. Does that fit, or was it something else?" leaves room for correction. The child may identify an unfair rule, a missing promise or a physical sensation that the log could not show. They may also say they do not know.

When the account arrives later, update the record instead of treating the delay as unreliability. People often understand an event better after their body has settled and they have found language. Keep both the observation and the child's explanation if they differ. That difference may show what was invisible to the adult, or what still needs careful enquiry.

Do not make insight the price of support. The child can receive clearer information, food, a quieter transition or a safe pause even if nobody has settled the exact reason.

Compare with a moment that went well

Logs often contain only incidents. Add a similar demand that the child managed:

On Thursday Maya stopped after a visible two-minute warning, ate a snack while finishing the round and came to tea without shouting.

Compare the conditions. Success may reveal warning, food, timing, privacy, a shorter instruction or recovery that adults had overlooked.

Do not use one good day to declare the difficulty solved. Ask which supports were present and whether the child paid a cost later.

Avoid three common decoding traps

The first is choosing a theory that cannot be disproved. “They always want control” can be fitted around any result. Replace it with a condition you can compare: “Unexpected endings are associated with more distress than endings shown on the timer.”

The second is treating what happened afterwards as the child's conscious plan. If shouting led to an adult coming close, record that connection may be relevant. Do not write that the child engineered distress for attention unless there is much stronger evidence, and even then ask why no safer route worked.

The third is expecting one function forever. The same outward action can arise from pain on Monday and task escape on Thursday. A response can also begin for one reason and be shaped by what follows. Review new information rather than protecting an elegant explanation.

Use ordinary language in family and school discussions. The purpose is shared understanding, not proving that one adult can use more technical terms than another.

Review the whole effect

After several ordinary occasions, review:

• frequency and intensity;
• how early the child could communicate;
• prompting and adult effort;
• safety;
• completion or participation;
• recovery time; and
• the child's experience.

A change that produces compliance and increases distress, sleep loss or fear is not successful overall. A change may also need practice before it becomes reliable. Agree a review point rather than judging it after one unusually easy or difficult day.

The one-week observation log develops this into a short pattern record. The interactive Behaviour Decoder turns the same six questions into a printable sheet.

Know when decoding is not enough

Do not use a worksheet to explain away sudden behaviour change, loss of skills, signs of pain, possible abuse, self-injury, aggression or immediate danger. Seek the appropriate health, safeguarding or urgent help.

Severe or persistent behaviour may need multidisciplinary assessment. A professional functional assessment is more systematic and should involve the child and family, physical and mental health, communication, environments, risk and quality of life ^[1].

A useful next step

Choose one incident, not the hardest incident in the family's history. Complete six lines: what happened, ten minutes before, pressures, afterwards, two possibilities and one change.

Show the description to the child in an accessible form. Add their correction without defending your version.

The decoder succeeds when it produces a better question and a safer experiment. It is not meant to produce a final explanation of the child.