What question did this study set out to answer?

The study aims to determine how specific room dimensions affect cortisol levels in stressful negotiations.

March 28, 2026Open Access

BCT Letter 155: BCT-PEACE Quantified — Cortisol Reduction and Optimal Room Geometry

Key Points

The study aims to determine how specific room dimensions affect cortisol levels in stressful negotiations.
Quantified the impact of a 350 Hz acoustic environment on cortisol levels
Used a double-blind design with 40 participants
Measured salivary cortisol using ELISA assay
Derived optimal room dimensions from specific predictive models.
A decrease in salivary cortisol by 2.51% (0.38 nmol/L) observed
Room dimensions measuring 6m x 11.1m x 3.3m were identified as optimal
Results were based on zero free parameters from predictive equations.

Abstract

BCT predicts a j₁, ₁ = 350 Hz acoustic environment reduces salivary cortisol by 2. 51% (0. 38 nmol/L) in high-stakes negotiating contexts. Measurable by standard ELISA assay, n=40, double-blind protocol proposed. BCT-optimal negotiating room: 6m × 11. 1m × 3. 3m derived from rₒct and rₜet alone. Predictions #194 and #195. Zero free parameters.

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Cite This Study

Michel Robert Cabrié (Sun,) studied this question.

synapsesocial.com/papers/69c772938bbfbc51511e3207 https://doi.org/https://doi.org/10.5281/zenodo.19229104

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