Seok, J.-W., Kim, J.U. · Journal of Clinical Medicine · 2024
Pooling 18 RCTs, EFT produced a large reduction in depressive symptoms versus control (Hedges' g=1.268, 95% CI 0.951-1.585, p<.001); group-delivered EFT (g=1.50) outperformed individual delivery (g=1.18), and effects were largest for people with moderate baseline depression (g=1.78, vs 0.67 mild, 0.78 severe, 0.62 at-risk); risk-of-bias analysis found roughly two-thirds of studies had some or high risk of bias (the paper's RoB analysis is inconsistently described as covering '20 studies' in one place and '18' elsewhere, a minor inconsistency in the source itself).
Pooling 18 randomized trials into a large effect size (Hedges' g over 1.2) is a serious, hard-to-wave-away signal — not cherry-picked anecdote but a systematic accounting of the literature showing a consistent pattern across very different populations, from veterans to nursing students to adolescents.
If the finding that group-delivered tapping outperforms one-on-one sessions holds up, it could mean community centers, schools, and low-income clinics could offer inexpensive group tapping sessions to people with moderate depression who can't access individual therapy or afford medication. Because tapping is self-taught, whatever a person picks up in that group session is theirs to keep using afterward, at no further cost, long after the program itself has ended.
With group delivery outperforming individual sessions, the next question is why — social reinforcement, or simply more total practice reps? A trial randomizing group size and dose while tracking inflammatory markers (CRP, IL-6, elevated in depression) and cortisol rhythm could show whether the psychological gains ride alongside a genuine anti-inflammatory shift. Mapping dose-response by baseline severity, since moderate depression saw the largest effect here, would also pinpoint who benefits most and how much practice they need.
| Design | Meta-analysis |
|---|---|
| Participants | 18 studies pooled |
| Population | mixed adults including veterans, medical patients, nursing students, and adolescents with mild-to-severe depressive symptoms (2008-2023 trials) |
| Comparison group | mixed across included trials — waitlist/no-treatment, treatment-as-usual, other active controls |
| Effect size | Hedges' g = 1.268 (95% CI 0.951-1.585) — on depressive symptoms, EFT vs control (between-group, random-effects); the paper explicitly contrasts this with prior meta-analyses (e.g. Nelms & Castel 2016) that used within-group pre-post Cohen's d and states its own Hedges' g method 'accounts for both the treatment and control groups' |
| Outcome measures | BDI, Hospital Anxiety and Depression Scale (HADS), PHQ-9 |
| Journal | Journal of Clinical Medicine |
| Year | 2024 |
| Country | South Korea |
| Language | English |
| Method | EFT / tapping |
| Publication type | Review or meta-analysis |
| Verification | ✓ Confirmed against the primary source |
Seok, J.-W., & Kim, J.U. (2024). The Effectiveness of Emotional Freedom Techniques for Depressive Symptoms: A Meta-Analysis. Journal of Clinical Medicine. https://doi.org/10.3390/jcm13216481
This record is part of the Tapping Evidence Base — an openly-sourced, fully-referenced directory of the research on EFT/tapping. Explore more studies on Depression
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