10.27. Cambridge–Chicago Compulsivity Trait Scale (CHI-T)


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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.

10.27.1. Intellectual property rights

  • Copyright (C) 2017 Samuel R. Chamberlain, Jon E. Grant.

  • Licensing: apply to authors for permission.

10.27.2. History

10.27.3. Source

  • Sam Chamberlain, personal communication, 2019 and 2023.

10.28. 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.