The term Human Performance Effect describes the direct, measurable relationship between built environments and the behaviour, efficiency, and physiological well-being of their inhabitants.
No design decision is neutral. Our bodies read and respond to architectural cues instantly, often at a biological level long before the conscious mind intervenes. By transitioning from design based on intuition to design driven by scientific intention, we can treat the workspace not as a static shell, but as a cognitive tool.
At TERRAVERTA Habitats, we don’t merely design spaces, we design for a feeling and a physiological state.
In this post, we offer an introduction to the relationship between the environments we inhabit and our performance as humans. We discuss how materials, lighting, open spaces and our tendency toward the biophilic can make or break cognitive, psychological and overall well-being.
The Power of Biophilic Analogues
Biophilic elements and natural materials consistently lower physiological stress indicators, facilitating a measurable shift from a “fight or flight” state to one of restorative calm.
While indoor plants are a staple of biophilic design, natural analogues, materials that mimic nature’s textures and patterns, offer a profound physiological advantage. Findings from HOK and the Harvard BIO study suggest that wood is a “super-material” for stress mitigation.
A counterintuitive fact of neuroaesthetics is that the brain “smells” wood even when the nose cannot detect a scent. This triggers a primitive safety response in the nervous system, stimulating parasympathetic activity and reducing autonomic tension.
Data from the BIO study revealed that natural elements are associated with a 1.8 mm Hg decrease in systolic blood pressure (SBP), while the use of natural analogues specifically leads to a 2.2 mm Hg SBP reduction. Most crucially, the presence of interior wood is linked to a significant drop in cortisol levels and heart rate.
The Creativity Paradox (Open vs. Enclosed Spaces)
The configuration of our workspace dictates our cognitive bandwidth. Despite the popularity of open-plan models, a 2013 Gensler workplace survey revealed that employees spend 54% of their time on tasks requiring individual focus. The Harvard BIO study highlights a distinct trade-off known as the Creativity Paradox.
| Metric | Open Office Spaces | Enclosed Office Spaces |
| Collaborative / Divergent Work | Encourages co-creation but increases noise-related stress. | Significant Z-score improvement (+0.4) in creativity when biophilic. |
| Focused / Individual Work | Prone to behavioural sinks where density impairs focus. | Lower reaction times in selective attention tasks vs. open biophilic. |
The Stroop Effect and Selective Attention
The BIO study utilised the Stroop Effect, measuring reaction times in selective attention tasks, to find that biophilic environments increased reaction times by 2.9% to 5.0%.
This occurs because natural environments induce a state of “soft fascination” or undirected attention. While this state is excellent for creative, divergent thinking, it can momentarily slow the high-speed selective data processing required for intense individual focus.
The Psychology of Proxemics (Smooth vs. Striated Space)
Proxemics, the study of interpersonal distance, dictates how we navigate the social architecture of the office. To prevent the stress of “crowding,” designers must balance two distinct cultural spaces:
- Smooth (Nomadic) Space: These are open, flexible environments reminiscent of a hotel lobby where seating is oriented towards others. This model supports informal learning and the co-creation of knowledge.
- Striated (Bounded) Space: These are structured, fixed environments like traditional desk rows or lecture halls. They reflect an organisational hierarchy and are designed for the linear delivery of information.
Within these configurations, we must account for self-congestion. Linked to our innate need for security, this phenomenon sees humans instinctively drawn to others in public spaces (clustering near pillars or shared zones) even when they explicitly state a privacy preference.
Attention Restoration Theory
Attention Restoration Theory (ART) posits that our directed attention, the finite resource used for analytical work, is easily fatigued. To replenish cognitive resources, we must integrate restorative niches into the office programme.
A restorative niche is a sanctuary designed to invite undirected attention, allowing the brain to recover from mental fatigue. Essential components include:
- Soft Sunlight: Connections to the outside world via skylights to regulate circadian biology.
- Indoor Gardens: Lush greenery to provide a visual and tactile living system.
- Therapeutic Soundscapes: Water features or reflecting pools that provide rhythmic acoustic cues, improving RMSSD (heart rate variability) and mental clarity.
TERRAVERTA: Soulful, Biophilic Architecture
At TERRAVERTA, we believe that human-centred design is biophilic and not an architectural luxury. When we align our built environments with our biological requirements, we provide the foundation for the human mind to perform at its peak.
Some takeaways to implement:
- Integrate Natural Analogues: Prioritise wooden surfaces to lower baseline cortisol and autonomic stress.
- Balance Spatial Literacy: Provide smooth spaces for nomadic collaboration and striated zones for deep, selective attention.
- Cultivate Restorative Niches: Ensure every floor contains a dedicated biophilic retreat to allow for undirected attention and cognitive recovery.
No design decision is neutral. When we optimise the space, we enable the occupant to flourish. Designing for the soul is the ultimate investment in human performance.
Sources
Stott, R. (2013) Successful workplaces balance focus and collaboration, Gensler Study finds |, ArchDaily. Available at: https://www.archdaily.com/414747/successful-workplaces-balance-focus-and-collaboration-gensler-study-finds (Accessed: 15 July 2026).
Why Some Spaces Feel Better Than Others (no date) Hok. Available at: https://www.hok.com/news/2026-07/why-some-spaces-feel-better-than-others/ (Accessed: 15 July 2026).
Yin, J. et. al (2019) Effects of biophilic interventions in office on stress reaction and cognitive function: A randomized crossover study in Virtual Reality – pubmed, PubMed. Available at: https://pubmed.ncbi.nlm.nih.gov/31418925/ (Accessed: 15 July 2026).
Weir, K. (2025) The stroop effect’s long (and colorful) influence, American Psychological Association . Available at: https://www.apa.org/research-practice/conduct-research/stroop-effect (Accessed: 15 July 2026).
Elkins, C. (2025) Unpacking the attention restoration theory (ART), Plant Plan. Available at: https://www.plantplan.co.uk/blog/unpacking-kaplan-kaplan-s-attention-restoration-theory-art- (Accessed: 15 July 2026).
I believe that the places we live, work and learn in are the most underleveraged assets most people will ever own. Not the address, not the market value but living potential of the environment itself, and its ability to actively shape wellness, learning, a teams productivity, and long-term financial returns.
A Master’s in Strategic Design from IE University, Madrid helped my thinking on future-forward strategies for spaces we inhabit, grounded in a foundational belief I’ve held long before that: everything is connected.