The Relationship Between Children's Exposure to Intimate Partner Violence and Intellectual and Developmental Disabilities: A Systematic Review of the Literature.

Mae Simcoe et al. (2018) hunted for every paper that asked: does seeing violence at home link with later IDD? They kept 11 studies that measured both IPV exposure and intellectual or developmental delay.

All papers were small and used quick, one-time surveys. No study followed kids over time. Most relied on parent memory or agency files to score violence exposure.

Seven of the 11 papers (a large share) showed a significant link. Kids who saw partner violence were more likely to carry an IDD diagnosis.

But every study looked at different age groups, different IQ cut-offs, and different violence questions. The authors say we still cannot tell if violence causes delays, worsens existing delays, or simply shows up in the same families.

Safer-Lichtenstein et al. (2019) audited autism social-skills trials and also found weak, uneven reporting. Together the two reviews show that developmental-disability research often uses sloppy, one-time measures, whether the topic is violence exposure or intervention success.

Karimi et al. (2024) calls for shared data sets and standard IDD definitions. Their plea directly answers Sarah’s problem: if every IPV study uses different delay criteria, future meta-analysis will stay impossible.

McKenna et al. (2019) looked for academic-intervention evidence in students with emotional disturbance and found almost none. Like Sarah, they conclude that big policy questions outrun the current evidence base.

When you see a new client with IDD, add brief IPV screening for caregivers. You are not diagnosing trauma; you are spotting a possible risk factor that other providers miss. Until longitudinal studies exist, treat the link as a yellow flag, not a sentence. Use the finding to justify broader service plans—speech, OT, mental-health supports—rather than assuming the disability is fixed and isolated.