How do I respond to relatives who do not believe the diagnosis?

The short answer

First decide whether the relative needs information, a boundary or less access to the conversation. Ask what the child wants shared where they can take part. Give one short explanation: who assessed the child, what the diagnosis helps explain and the practical change required. Do not present the child for inspection or share a private report only to win belief. If the relative says the child behaves differently with them, acknowledge the observation and compare the setting, demands, support and recovery; different behaviour does not by itself overturn an assessment. Correct a stereotype briefly and offer one reliable source if the person is genuinely willing to learn. Then move to behaviour: they do not have to understand every part of the diagnosis before they stop comments about laziness, accept a boundary around touch or give the child more processing time. Do not debate the diagnosis in front of the child. If disbelief continues, end the conversation and change the conditions of contact. Family connection should not require a child to absorb ridicule, repeated invalidation or attempts to remove support. Concerns about the accuracy of an assessment belong with an appropriately qualified professional and the family, not a public argument at a visit.

• Decide what may be shared before trying to persuade a relative.
• Explain the diagnosis once and connect it with one practical request.
• Treat different behaviour as information about conditions, not a vote on diagnosis.
• End repeated debate and keep it away from the child.
• Reduce or change contact when disbelief becomes ridicule or undermines support.