EMDR Therapy: What the Research Says

Eye Movement Desensitization and Reprocessing, better known as EMDR, is one of the more distinctive-looking therapies in mental health care. Sessions typically involve recalling a distressing memory while following a set of bilateral stimulation cues, usually the therapist’s fingers moving side to side, alternating tones, or gentle tapping.

What EMDR actually involves

EMDR follows a structured eight-phase protocol. Early sessions focus on history-taking, stabilisation and building coping resources, before moving into the reprocessing phases where the client briefly holds a target memory in mind, its associated negative belief, and the bodily sensations that go with it, while engaging in bilateral stimulation in short sets. The theory is that this process supports the brain’s natural information-processing system to work through traumatic memories that have become “stuck,” so they can be stored more like ordinary past events. Unlike some trauma therapies, EMDR does not require the client to describe the traumatic event in detail out loud, which some people find makes it more approachable.

What the research says

EMDR has been studied for post-traumatic stress disorder more than for any other condition, and the evidence here is genuinely strong. A 2025 systematic review and meta-analysis published in the British Journal of Psychology adds to a long line of meta-analytic support, finding EMDR produced significant, often large, reductions in PTSD symptoms compared with waitlist or usual care, with effects broadly comparable to trauma-focused CBT.

The World Health Organization includes EMDR alongside trauma-focused CBT as a recommended treatment for PTSD in adults and children.WHO clinical guidance

The American Psychological Association’s clinical practice guideline for PTSD gives EMDR a “conditional” recommendation, while treatments like Cognitive Processing Therapy and Prolonged Exposure currently hold the guideline’s “strong” recommendation based on a larger and longer-standing trial base. More recent research has also started to examine EMDR’s use beyond a single traumatic incident, including cross-national meta-analytic work finding benefits persisting well beyond the end of treatment.

Who tends to benefit from EMDR

EMDR is most established for single-incident and complex trauma, including PTSD following accidents, assault, medical trauma and childhood adversity. It is also increasingly used, with a smaller but growing evidence base, for some anxiety-related presentations, grief and phobias where a specific memory or event underlies ongoing distress.

What sessions look like in practice

A course of EMDR typically runs for a number of sessions tailored to the complexity of the trauma history, starting with careful preparation before any reprocessing work begins. Your psychologist will assess suitability first, since EMDR, like other trauma therapies, needs to be paced appropriately.

References:
Simpson, R., et al. Clinical and cost-effectiveness of EMDR for treatment and prevention of PTSD in adults. British Journal of Psychology (2025).
Efficacy of EMDR for Patients with PTSD: A Meta-Analysis of RCTs. PLOS ONE (2014).
EMDR treatment in the medical setting: a systematic review. PMC (2024).
American Psychological Association Clinical Practice Guideline for the Treatment of PTSD in Adults.