Dorothy V. M. Bishop|Pamela Snow|Paul A. Thompson|Trisha Greenhalgh
Phase 2 of CATALISE: a multinational and multidisciplinary Delphi consensus study of problems with language development: Terminology
University of Oxford|University of Oxford|University of Oxford|University of Oxford
lack agreement criteria terminology childrens language problems affects access services well hindering research practice report second phase study using online delphi method address issues first phase focused criteria language disorder consider terminologythe delphi method iterative process initial set statements rated panel experts opportunity view anonymised ratings panel members basis either revise views make case position statements revised based panel feedback rated commented panel study feedback second round used prepare final set statements narrative form panel included 57 individuals representing range professions nationalitieswe achieved least 78 agreement 19 21 statements within two rounds ratings collapsed 12 statements final consensus reported term language disorder recommended refer profile difficulties causes functional impairment everyday life associated poor prognosis term developmental language disorder dld endorsed use language disorder associated known biomedical aetiology also agreed presence risk factors neurobiological environmental preclude diagnosis dld b dld cooccur neurodevelopmental disorders eg adhd c dld require mismatch verbal nonverbal abilitythis delphi exercise highlights reasons disagreements terminology language disorders proposes standard definitions nomenclature