Overview
The cPTCI was developed from the adult PTCI (Foa et al., 1999). It is a 25-item measure of trauma appraisals developed for under 18s, where young people rate their endorsement of each item as 'Don't agree at all', 'Don't agree a bit', 'Agree a bit' and 'Agree a lot'. Items include, for example, 'I don't trust people' and 'My reactions since the frightening event mean I will never get over it'.Scoring & Interpretation
The cPTCI is a 25-item measure of trauma appraisals developed for under 18s, where young people rate their endorsement of each item as 'Don't agree at all', 'Don't agree a bit', 'Agree a bit' and 'Agree a lot'. Items include, for example, 'I don't trust people' and 'My reactions since the frightening event mean I will never get over it'. The cPTCI has two subscales, the first relating to the sense of 'permanent and disturbing change' since the trauma, and the second relating to the sense of being 'a fragile person in a scary world'. Items for the first subscale, permanent and disturbing change are: 4, 6, 8, 13, 14, 16, 17, 19, 20, 21,22, 23, 24). Items for the second subscale are: 1, 2, 3, 5, 7, 9, 10, 11, 12. 15, 18, 25.Psychometric Properties
Internal Consistency
The original validation study indicated high internal consistency, ranging from .86 to .93, for each subscale - with the scale relating to perceived 'permanent and disturbing change' having slightly greater internal consistency.
Test-Retest Reliability
Strong test-retest reliability was demonstrated when the sample from the original study repeated the measure 3 months later (r = .72).
Factor Structure
Two-factor solution corresponding to 1. a sense of disturbing permanent change following the trauma, and 2. to a sense of being vulnerable in a world that feels unsafe (Meister-Stedman et al., 2009).
Validity
The original validation study indicated high convergent validity between the total scale, subscales and other measures of post-traumatic stress symptoms including the Revised Impact of Events Scale for Children (RIES-C) and Child Post-traumatic Stress Scale (CPSS), in addition to measures of depressive symptoms.