Hassiotis, Angela, Melville, Craig, Jahoda, Andrew, Strydom, Andre, Cooper, Sally-Anne, Taggart, Laurence, Cooper, Vivien, Chauhan, Umesh ORCID: 0000-0002-0747-591X and Et, Al (2022) Estimation of the minimal clinically important difference on the Aberrant Behaviour Checklist–Irritability (ABC-I) for people with intellectual disabilities who display aggressive challenging behaviour: A triangulated approach. Research in Developmental Disabilities, 124 . ISSN 0891-4222