Since its publication in 2019, the FAIT has begun to be used more widely to inform a variety of care packages and therapeutic interventions. Understanding the Impact of Trauma takes the FAIT as a starting point, exploring the concept of ‘ emotional disability’ that can follow a traumatic event and the usefulness of applying models like the FAIT more broadly to anyone who has experienced trauma. It will introduce some of the key theories that have informed our understanding of the emotional development of people with intellectual disabilities, followed by a series of case studies focusing on different individuals and how their emotional development informed their therapeutic interventions, including people with intellectual disabilities, people with mental health issues, people living with dementia and autistic people.