Measuring symptoms of post-traumatic stress disorder in people with intellectual disabilities: the development and psychometric properties of the Impact of Event Scale-Intellectual Disabilities (IES-IDs)

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Hall, James C., Jobson, Laura and Langdon, Peter E. ORCID: https://orcid.org/0000-0002-7745-1825 (2014) Measuring symptoms of post-traumatic stress disorder in people with intellectual disabilities: the development and psychometric properties of the Impact of Event Scale-Intellectual Disabilities (IES-IDs). British Journal of Clinical Psychology, 53 (3). pp. 315-332. ISSN 0144-6657

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Abstract

Background: The aims of the study were to (1) revise the Impact of Event Scale–Revised for use with people with intellectual disabilities (IDs), creating the Impact of Event Scale–Intellectual Disabilities (IES-IDs), (2) assess the reliability of the IES-IDs, and (3) compare the IES-IDs to an existing measure trauma-related symptomatology, namely the Lancaster and Northgate Trauma Scale (LANTS), along with measures of anxiety and depression. Methods: Forty adults with IDs who had experienced at least one traumatic event were recruited and completed the IES-IDs and the LANTS on two occasions, separated by 2 weeks. Participants also completed the Glasgow Depression Scale and the Glasgow Anxiety Scale, along with the Trauma Information Form which was used to collect information about trauma history. Results: Fifteen per cent of the sample had encountered five or more traumatic events. The IES-IDs and the LANTS had good to excellent internal consistency and test–retest reliability. Both measures correlated with self-report measures of depression and anxiety, although the strength of this correlation was greater with the LANTS. There was a significant positive correlation between trauma frequency and the IES-IDs, while trauma frequency did not correlate with the LANTS. Conclusions: Both the IES-IDs and the LANTS appear to have good reliability.

Item Type: Article
Additional Information: Research Funding: National Institute for Health Research
Faculty \ School: Faculty of Medicine and Health Sciences > Norwich Medical School
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Depositing User: LivePure Connector
Date Deposited: 25 Jul 2023 11:30
Last Modified: 25 Jul 2023 11:30
URI: https://ueaeprints.uea.ac.uk/id/eprint/92677
DOI: 10.1111/bjc.12048

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