 Our participants will be parents and their children, aged 30-54 months, with a diagnosis of speech sound disorder. They will be recruited via speech and language therapy services in the North West. Data collection will be carried out by the research team in participants homes, taking 3-4 hours in total over 2-3 appointments. The sessions will be audio-recorded; parents will complete questionnaires, and childrens language and speech will be assessed with standardised and in-house tests. 