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The Computer\u2010Based Instrument for Low motor Language Testing (C\u2010BiLLT) (originally validated in Dutch) is a computerized test of spoken language comprehension that children with motor disorders control using their usual response methods.<\/jats:p><\/jats:sec><jats:sec><jats:title>Aims<\/jats:title><jats:p>To create a UK version of the C\u2010BiLLT, evaluate its validity and reliability, and assess its practicability for children with motor disorders.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods &amp; Procedures<\/jats:title><jats:p>The C\u2010BiLLT was translated into British English and items were adapted to ensure familiarity to UK children. A total of 424 children (233 females, 191 males) aged 1:6\u20137:5 (years:months) without developmental disabilities were recruited from North East England. Children completed the UK C\u2010BiLLT and Preschool Language Scales 5 (PLS\u20105) for convergent validity evaluation and either the visual reception subtest of the Mullen Scales of Early Learning (MSEL) (children aged 1:8\u20135:5) or Ravens Coloured Progressive Matrices (CPM) (ages 5:6\u20137:5) to assess divergent validity. A total of 33 children completed the UK C\u2010BiLLT within 4 weeks of initial assessment for test\u2013retest reliability assessment (intraclass correlation coefficient\u2014ICC). Internal consistency was assessed using Cronbach's alpha and exploratory factor analysis examined structural validity. A total of 24 children (10 female, 14 male; aged 4\u201312 years) with non\u2010progressive motor disorders who use augmentative and alternative communication (AAC), rated the UK C\u2010BiLLT's ease of use and completed British Picture Vocabulary Scales (BPVS) and CPM as for convergent and divergent validity testing.<\/jats:p><\/jats:sec><jats:sec><jats:title>Outcomes &amp; Results<\/jats:title><jats:p>Internal consistency was high for children without motor disorders (<jats:italic>\u03b1<\/jats:italic>\u00a0=\u00a00.96). Exploratory factor analysis extracted two factors, together explaining 68% of the total variance. Test\u2013retest reliability was excellent (ICC\u00a0=\u00a00.95; 0.90\u20130.98 95% confidence interval\u2014CI). UK C\u2010BiLLT scores correlated highly with PLS\u20105 (<jats:italic>r<\/jats:italic>\u00a0=\u00a00.91) and MSEL (<jats:italic>r<\/jats:italic>\u00a0=\u00a00.81), and moderately with CPM (<jats:italic>r<\/jats:italic>\u00a0=\u00a00.41); and increased across full\u2010year age\u2010bands (<jats:italic>F<\/jats:italic>(6, 407)\u00a0=\u00a0341.76, <jats:italic>p<\/jats:italic>\u00a0=\u00a0&lt; 0.001, <jats:italic>\u03b7<\/jats:italic><jats:sup>2<\/jats:sup>\u00a0=\u00a00.83). A total of 19 children with motor disorders rated the UK C\u2010BiLLT as easy\/ok to use; two judged it hard; three declined to rate the ease of use. Their UK C\u2010BiLLT scores correlated highly with BPVS (<jats:italic>r<\/jats:italic>\u00a0=\u00a00.77) and moderately with CPM (<jats:italic>r<\/jats:italic>\u00a0=\u00a00.57).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions &amp; Implications<\/jats:title><jats:p>The UK C\u2010BiLLT is a valid, reliable measure of early spoken language development and is potentially practicable for children with motor disorders. It may facilitate international research on the language development of children with motor disorders and evaluation of intervention at the national level.<\/jats:p><\/jats:sec><jats:sec><jats:title>WHAT THIS PAPER ADDS<\/jats:title><jats:sec><jats:title>What is already known on the subject<\/jats:title><jats:p><jats:list list-type=\"bullet\">\n<jats:list-item><jats:p>Young children with motor disorders have difficulties accessing standardized assessments of language comprehension that require children to handle objects or to speak a response.<\/jats:p><\/jats:list-item><\/jats:list><\/jats:p><\/jats:sec><jats:sec><jats:title>What this paper adds to the existing knowledge<\/jats:title><jats:p><jats:list list-type=\"bullet\">\n<jats:list-item><jats:p>This study demonstrates the validity and reliability of a UK translation of the C\u2010BiLLT and suggests that the measure is feasible for children with motor disorders who use AAC and have a reliable method of response via computer access.<\/jats:p><\/jats:list-item><\/jats:list><\/jats:p><\/jats:sec><jats:sec><jats:title>What are the potential or clinical implications of this work?<\/jats:title><jats:p><jats:list list-type=\"bullet\">\n<jats:list-item><jats:p>The UK C\u2010BiLLT is a useful addition to the limited tools currently available to assess early spoken language comprehension of children with motor disorders.<\/jats:p><\/jats:list-item>\n<\/jats:list><\/jats:p><\/jats:sec><\/jats:sec>","DOI":"10.1111\/1460-6984.70025","type":"journal-article","created":{"date-parts":[[2025,3,19]],"date-time":"2025-03-19T05:48:21Z","timestamp":1742363301000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["The UK C\u2010BiLLT: Validity and reliability of an online assessment of spoken language comprehension for children with severe motor disorders"],"prefix":"10.1111","volume":"60","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4540-2586","authenticated-orcid":false,"given":"Lindsay","family":"Pennington","sequence":"first","affiliation":[{"name":"Population Health Sciences Institute, Faculty of Medical Sciences Newcastle University  Newcastle upon Tyne UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lily","family":"Potts","sequence":"additional","affiliation":[{"name":"Population Health Sciences Institute, Faculty of Medical Sciences Newcastle University  Newcastle upon Tyne UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Janice","family":"Murray","sequence":"additional","affiliation":[{"name":"Faculty of Health and Education Manchester Metropolitan University  Manchester UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7821-7232","authenticated-orcid":false,"given":"Johanna","family":"Geytenbeek","sequence":"additional","affiliation":[{"name":"Department of Rehabilitation Medicine, Amsterdam UMC VU University  Amsterdam the Netherlands"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kate","family":"Laws","sequence":"additional","affiliation":[{"name":"Regional Communication Aids Service Cumbria, Northumberland, Tyne and Wear NHS Foundation Trust, Newcastle upon Tyne  UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jenefer","family":"Sargent","sequence":"additional","affiliation":[{"name":"Great Ormond Street Hospital NHS Foundation Trust  London UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Michael","family":"Clarke","sequence":"additional","affiliation":[{"name":"Department of Speech, Language and Hearing Sciences San Francisco State University  San Francisco USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"John","family":"Swettenham","sequence":"additional","affiliation":[{"name":"Division of Psychology &amp; 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