technology

How Having a Virtual Body Changes Your Sense of Time

Stand in virtual reality without a body and time crawls. Give yourself hands and suddenly the minutes move normally again.

Researchers put people in VR headsets and asked them to flip a light switch on and off while estimating how much time passed. Some participants had no avatar at all—just a floating viewpoint. Others had virtual hands. A third group got a full-body avatar. After each session, everyone answered the same question: "How quickly did time seem to pass?"

The bodiless group consistently felt time dragging. The ones with hands or full avatars? Time moved at its usual pace.

This matters because it suggests something strange about how we experience duration. We usually think of time perception as happening in the brain, maybe influenced by how busy or bored we are. But this study controlled for activity—everyone did the exact same repetitive task. The only difference was whether they could see a body doing it.

What's curious is that this effect only showed up in subjective time perception—the felt sense of whether time is crawling or flying. When researchers asked participants to judge specific durations (count to 30 seconds, estimate how long the light stayed on), embodiment made no difference. A second feels like a second whether you have hands or not. But the flow of time—that vague sense of whether an experience is dragging or not—needs a body.

This connects to something psychologists call interoception: your brain's continuous monitoring of signals from inside your body. Heart rate, breathing, the weight of your limbs. These signals normally hum along in the background, but they might be anchoring your sense of time passing. Remove the visual feedback of having a body, and maybe you lose some of that temporal scaffolding.

It also raises questions about what happens in extended VR sessions, or in conditions like depersonalization disorder where people report feeling disconnected from their own bodies. If embodiment anchors our experience of time's passage, what happens when that anchor drifts?

Based on the paper "Body and Time: Virtual Embodiment and its Effect on Time Perception"
Fabian Unruh (2023) · 10.1109/tvcg.2023.3247040
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