The neuroscience of where you live.
Built space shapes nervous systems. Here are the seven effects we measure for, the research that grounds each, and the Sanskrit ancestor that named it first. These are population-level findings; how strongly each applies to one flat and one person varies, which is why every signal carries its confidence.
The vocabulary
भाव
Bhāva
Affective response · hedonic load
What the room itself carries
स्पन्द
Spanda
Resonance · attunement · biophilic affinity
How it meets your nervous system
सङ्केत
Saṅketa
Data signal · perceptual cue
The signal we extract and serve back to you
The seven effects
The Cathedral Effect
Meyers-Levy & Zhu, 2007
In Meyers-Levy & Zhu's studies, ceiling height changed how people thought: air overhead nudged them toward big-picture, creative thinking, while lower ceilings pulled them into focus and detail. The ceiling isn't decoration; the research suggests it quietly sets the mode your mind works in.
Sanskrit ancestor
ākāśa (आकाश) · the open quality of dwelling space
In HabitatSignal
Ceiling height is estimated from the photos themselves, not from staging. Contributes to the Light & Space signal score.
Prospect & Refuge
Appleton, 1975 · Hildebrand, 1991
Appleton's prospect-refuge theory says you relax in rooms where you can see far while feeling tucked in: the window seat, the corner sofa. The research links long sightlines from a sheltered spot with lower vigilance and deeper rest: see without being seen, and your body stands down.
Sanskrit ancestor
dṛṣṭi-koṇa (दृष्टि-कोण) · the angle of sight
In HabitatSignal
The longest sightline in each room is assessed from the photos. Shapes the Space and Layout signals.
Biophilic Stress Reduction
Ulrich, 1984 · Kaplan & Kaplan, 1989
A view of green may be medicine. In Ulrich's landmark 1984 hospital study, patients facing trees healed faster than patients facing a brick wall, and later work has kept linking window greenery to a calmer stress system. Physiology, not aesthetics.
Sanskrit ancestor
vana (वन) · the view of the forest
In HabitatSignal
Greenery exposure is read per photo, alongside neighbourhood canopy density. Contributes to Light, Air, and the Locality score.
Light Direction & Circadian Entrainment
Lockley & Brainard, multiple studies
Which way your windows face decides when daylight reaches you. The circadian research of Lockley and Brainard links gentle morning light from the east with a well-set body clock, while harsh evening light from the west can push sleep later. Same flat, different windows: different sleep.
Sanskrit ancestor
sūrya-mukha (सूर्यमुख) · sun-facing aspect
In HabitatSignal
Window orientation is inferred where the photos allow it. Drives the Light signal.
Wide-Angle Distortion Correction
Sirente Labs · perspective inference
A wide-angle lens makes a 12-square-metre room look like a loft; that's the whole grammar of listing photography. Uncorrected, everything you believe about the space is a little too generous. We un-stretch the photo before we score it.
Sanskrit ancestor
māyā (माया) · the illusion the lens creates
In HabitatSignal
Perspective correction applied to every uploaded photo. Underpins Space, Layout, and the AI-generation flag.
Threshold Sequence & Place Memory
O'Keefe (Nobel 2014) · Bachelard, Poetics of Space
O'Keefe's Nobel-winning work on place cells showed the brain maps a place from sequences of doorways and turns. The way you enter a home (the arrival) may shape whether it gets encoded as 'home' or just 'the building you live in.' It's part of why some places feel like yours within a week.
Sanskrit ancestor
gṛha-praveśa (गृहप्रवेश) · the entry into a dwelling
In HabitatSignal
Entry-sequence signals, where the photos allow it. Contributes to a future Belonging signal.
Acoustic Floor & Sleep Architecture
Basner et al., 2014 · sleep-medicine literature
Noise you sleep through still costs you. Basner's sleep research links ambient sound barely above a quiet library's hum with fragmented deep sleep, even when it never wakes you. A locality is loud or quiet long before you spend your first night in it.
Sanskrit ancestor
śabda (शब्द) · the field of sound
In HabitatSignal
Locality noise score from traffic, transit, nightlife density. Contributes to the Locality and Air signals.
The calibration rule
Every effect listed here is either currently computed in the analyzer or is in active development for an upcoming release. We publish the full vocabulary so you know what we measure for, and so we hold ourselves to delivering it. When a signal goes live, its card loses the Shipping soon tag and starts contributing to verdicts. No claim sits on this page that the product does not earn.
How to read this page
The research cited here describes population-level findings; individual responses vary, and a photo-based analysis is an estimate, not a measurement taken in the room. HabitatSignal verdicts are decision support, not a structural survey, a medical claim, or a substitute for visiting a home and, where it matters, bringing a qualified inspector.