Measuring accumulation : Constructing a tool for evaluating cumulative harm in children engaged with an intensive family support service

There is a significant body of research that attests to the deleterious impact of an accumulation of adverse childhood experience across the lifespan, which provides a strong rationale for the development of a means for evaluating this accumulation in a high-risk population. We developed a theory-driven measure, the Cumulative Experiences Index, and conducted a pilot study to test its utility. The Cumulative Experiences Index derives a cumulative harm score that can be used to inform intervention and prevention strategies, programmes and initiatives across all tiers of public health prevention intervention. The Cumulative Experiences Index was piloted with 50 participants aged 8–17 years old who were actively engaged with an Intensive Family Support service. The study explores whether cases rated as low, medium or high severity on the Cumulative Experiences Index corresponded with severity ratings on the three measures of concurrent validity: the Strengths and Difficulties Questionnaire, Kessler-10 and Children's Revised Impact of Events Scale. The Index provides a valid and accurate means of reflecting the interconnectedness and complexity of exposure to different forms of harm that accumulates over time. Practitioners and researchers will benefit from using the Cumulative Experiences Index—a new valid and reliable measure of cumulative harm.

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