.. docs/source/tasks/chit.rst .. Copyright (C) 2012, University of Cambridge, Department of Psychiatry. Created by Rudolf Cardinal (rnc1001@cam.ac.uk). . This file is part of CamCOPS. . CamCOPS is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. . CamCOPS is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. . You should have received a copy of the GNU General Public License along with CamCOPS. If not, see . .. _chit: Cambridge–Chicago Compulsivity Trait Scale (CHI-T) -------------------------------------------------- .. include:: include_data_collection_plus_local_upgrade.rst 15-item measure of self-reported compulsivity. 15 items, rated on a 5-point scale: strongly disagree – strongly agree. Scored 0–4, with higher ratings for stronger agreement. Intellectual property rights ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ - Copyright (C) 2017 Samuel R. Chamberlain, Jon E. Grant. - Licensing: apply to authors for permission. History ~~~~~~~ - Chamberlain SR, Grant JE (2018). Initial validation of a transdiagnostic compulsivity questionnaire: the Cambridge-Chicago Compulsivity Trait Scale. *CNS Spectrums* 23: 340-346. https://www.ncbi.nlm.nih.gov/pubmed/29730994; https://doi.org/10.1017/S1092852918000810. - Tiego J, Trender W, Hellyer PJ, Grant JE, Hampshire A, Chamberlain SR (2023). Measuring compulsivity as a self-reported multidimensional transdiagnostic construct: large-scale (n = 182,000) validation of the Cambridge-Chicago Compulsivity Trait Scale. *Assessment* (online ahead of print). https://pubmed.ncbi.nlm.nih.gov/36680457/; https://doi.org/10.1177/10731911221149083. Source ~~~~~~ - Sam Chamberlain, personal communication, 2019 and 2023. Notes ----- - Pronounced "kye-tee" (by analogy to chi, chi-square), not "chit" (personal communication, task authors to Martin Burchell, Feb 2023). - Prior to CamCOPS v2.4.15 the 15 items were rated on a 4-point scale (scoring 0–3: 0 strongly disagree, 1 disagree, 2 agree, 3 strongly agree), for a total score of 45, and there was an additional question about subjective impairment with a yes/no answer. This reflects the original version used in Chamberlain & Grant (2018), and CHI-T v1.0 by internal numbering. - From CamCOPS v2.4.25, the range is 0–4 (0 strongly disagree, 1 disagree, 2 neither agree nor disagree, 3 agree, 4 strongly agree). The 15 questions are unchanged. This takes the total score to 60, and the additional yes/no question is no longer used. This reflects the version used for large-scale validation by Tiego et al. (2023), and CHI-T v1.1 by internal numbering. It is intended to replace the previous version.