Spending just four minutes virtually embodying a growing rainforest tree can significantly reduce symptoms in patients with depression and schizophrenia, according to new research from Berlin’s Charité University Hospital. The findings, published in JMIR Serious Games, offer a promising glimpse into how immersive virtual reality could become a practical, non-drug treatment option for people living with serious mental illness.
The study recruited 60 participants divided into three groups: 20 patients with depression, 20 with schizophrenia, and 20 healthy controls. Each participant put on a VR headset and experienced a short application called “Tree”, developed by researchers at the Massachusetts Institute of Technology. Users inhabit the perspective of a growing rainforest tree, beginning as a seed underground and rising towards the forest canopy while animals move through the surrounding jungle.
Symptom burden, measured using a visual analogue scale targeting each patient’s three most prominent individual symptoms, fell significantly in both patient groups after the session. Patients with depression reported a mean symptom score dropping from 6.58 to 4.42, while those with schizophrenia saw scores fall from 5.18 to 2.92. Researchers described the effect size as large and precisely estimated, which is notable given the brevity of the intervention.
Beyond symptom relief, all three groups showed substantial increases in their sense of connectedness to nature, and levels of compassion rose across every group regardless of diagnosis. Empathy scores, however, did not change significantly, a finding the researchers suggest distinguishes compassion as a distinct emotional response rather than a byproduct of general empathic capacity.
The virtual reality experience also triggered measurable physiological responses. Electrodermal activity, which reflects emotional arousal through changes in skin conductance, rose significantly during the session compared with baseline readings taken at the start of the VR experience. This physiological data adds an objective dimension to what might otherwise appear as purely self-reported improvements.
One particularly notable finding concerns the role of virtual body ownership. Participants who more strongly felt that the tree was their own body showed greater increases in compassion. Spirituality also predicted compassion changes, though interestingly in the opposite direction, with higher spirituality associated with a smaller rise. The sense of “presence,” or feeling of genuinely being inside the virtual world, did not predict compassion changes on its own.
The researchers are careful to note that the study was exploratory, with a small sample and no long-term follow-up. A single four-minute session cannot demonstrate lasting therapeutic benefit, and the study lacked a control condition using a different VR scenario for comparison. Future research will need to examine repeated sessions, varied symptom profiles, and integration with established body-oriented psychotherapy approaches.
What the study does show is that psychiatric inpatients, including those with acute psychosis, are able to engage safely and meaningfully with immersive VR. For clinical settings in urban environments where access to green space is limited, virtual nature experiences may represent an accessible and acceptable complement to existing treatments.