BBARK - Issue 1: How Environments Shape Mind and Behavior

Across five very different studies, ranging from massive global video-game datasets to EEG nature walks and VR- based attention experiments, a remarkably unified story emerges: the environments we grow up in, move through, recover in, and design around us profoundly shape cognition, mental health, and behavior. Your childhood streets are quite literally still in your head: whether you learned to navigate the quiet chaos of Prague or the tidy grid of Chicago predicts the spatial layouts your brain handles best decades later, reminding us that environments do not just surround us - they train us. Cities, too, exert their influence through complex “environmental profiles”, where combinations of air pollution, street density, deprivation, and green space map onto distinct psychiatric symptom groups through different neurobiological pathways, showing that urban environments are anything but neutral. Meanwhile, nature consistently gives the brain a break: a simple 40-minute walk among trees allows executive attention to rest, boosts mood more than an equivalent city walk, and does so with measurably less cognitive effort - an effect confirmed directly through EEG. Even the view out a hospital window matters: patients recovering from surgery required less pain medication and were discharged sooner when they could see trees instead of a brick wall, one of the earliest and most striking demonstrations of design affecting biology. And at the scale of moment-to-moment perception, architecture itself bends attention in which sharp turns and corridor geometry reorganize attentional patterns so strongly that they can even invert classic laboratory effects, revealing how our brains recalibrate in real time as we move through space. Taken together, these studies echo a central insight explored in David Eagleman’s Incognito: much of what shapes our perception, behavior, and experience unfolds outside conscious awareness, quietly guiding how we respond to the environments around us. Together, these findings show that design is deeply entwined with how we live, often in ways we do not consciously notice but which shape us continuously. We hope you enjoy diving deeper into each study.