Inferiority or Even Superiority of Virtual Reality Exposure Therapy in Phobias?-A Systematic Review and Quantitative Meta-Analysis on Randomized Controlled Trials Specifically Comparing the Efficacy of Virtual Reality Exposure to Gold Standard in vivo Exposure in Agoraphobia, Specific Phobia, and Social Phobia.
Level 1 - systematic review of randomized trials
Systematic review and meta-analysis of randomized controlled trials
PubMed 31551840 · doi:10.3389/fpsyg.2019.01758
What was done
A systematic review and meta-analysis evaluated randomized controlled trials published up to June 2019 comparing virtual reality (VR) exposure directly to gold-standard in vivo exposure with equivalent exposure duration in adults with Specific Phobia, Social Phobia, or Agoraphobia. Treatment effect sizes (Hedges' g) were calculated for VR exposure, in vivo exposure, and direct head-to-head comparisons overall and stratified by diagnosis.
What was found
Nine studies (n = 371; 4 specific phobia, 3 social phobia, 2 agoraphobia) met inclusion criteria. Both VR and in vivo exposure generated large, significant within-condition effect sizes. Head-to-head comparison showed a non-significant overall difference favoring in vivo exposure (g = -0.20). Subgroup analyses revealed non-significant differences for Specific Phobia (g = -0.15) and Agoraphobia (g = -0.01), whereas in vivo exposure was significantly superior for Social Phobia (g = -0.50).
Why it matters
When exposure dose is matched, VR exposure performs comparably to in vivo exposure for specific phobias and agoraphobia, supporting its use as an accessible alternative. However, current VR implementations lag behind in vivo exposure for social phobia, suggesting virtual social interaction scenarios require further refinement.
Limits
The total evidence base is small (9 studies, 371 participants), with only 2 studies evaluating agoraphobia. Study-specific effect sizes varied widely, particularly in social phobia, and the abstract does not report long-term follow-up outcomes, adverse effects such as simulator sickness, or details on attrition.
Cited by
- supports Exposure therapy requiring individuals to engage in real-world social interactions is more effective at overcoming social anxiety than simulated or imagined interactions.