Principle
Assume the measurement can change the behavior
The thermometer can sometimes warm the room.
When it fits
- A survey, checklist or reflection question is being used to measure workplace behavior repeatedly.
When to avoid it
- Measurement effects vary; the cited 2026 meeting study suggests reactivity in its context, not a universal Hawthorne-effect size.
Why it matters
Ask whether the act of measurement itself could prompt reflection or change the behavior you are observing. If yes, design the comparison accordingly and avoid treating the measurement condition as neutral. Keep the questions as light as possible when unbiased observation matters; use them intentionally as an intervention when reflection is the actual goal.
An example
A post-meeting survey asking whether the goal was clear may itself make people think about goal clarity before their next meeting.
Check your result
The evaluation report names plausible measurement reactivity rather than assuming the survey only observed behavior.
Keep this limit in mind
- Measurement effects vary; the cited 2026 meeting study suggests reactivity in its context, not a universal Hawthorne-effect size.
Evidence and sources
The 2026 meeting field experiment reported that post-meeting surveys appeared to function as an intervention, with self-reported awareness and behavior improving across both treatment and control groups.
This suggests measurement reactivity; it does not quantify a universal survey effect outside the studied context.
Nudging Attention to Workplace Meeting Goals: A Large-Scale, Preregistered Field Experiment · Abstract mixed-methods findings