Evidence Domain

Biometrics

What it studies

The measurement of physiological signals — heart rate variability, skin conductance, eye movement, movement patterns — as indicators of stress, load, comfort and arousal. In workplace research it appears in environmental studies; in workplace operations it appears as a governance problem.

Why it matters

As research instrumentation in controlled studies, biometrics has contributed real findings on environmental stress and comfort. As operational workplace measurement, it sits at the outer boundary of what consent, proportionality and trust can bear — and workplace strategy must know both facts: what the research offers, and why the operational use is rarely justifiable.

Questions it answers
  • What has physiological measurement established about environmental stress and comfort?
  • Where is biometric evidence stronger than self-report, and where weaker?
  • What governance would biometric workplace measurement require — and can it realistically be met?
  • When is the answer simply no?
Evidence sources
  • Environmental physiology and comfort research using biometric instrumentation
  • Critical literature on workplace surveillance and function creep
  • Data protection guidance on special-category data
Design and policy implications

Research findings applied at the design-evidence level (comfort criteria informed by physiological studies) without operational biometric collection; any proposed workplace biometric use subjected to necessity and proportionality tests it will usually fail; aggregate environmental sensing preferred categorically over person-level physiological monitoring.

Related methods
Common misuse

Wellness-framed surveillance: physiological monitoring marketed as employee care. Biometric data is special-category data in most jurisdictions; its workplace collection is rarely necessary, rarely proportionate, and reliably corrosive to the trust every other evidence stream depends on. This domain's most common misuse is its use.

Further research

Laboratory-to-field validity of physiological comfort indicators remains an open question; the governance frameworks for any legitimate applied use are less developed than the sensors.