Observer effect

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Observer effect may refer to:

  • Hawthorne effect, a form of reactivity in which subjects modify an aspect of their behavior, in response to their knowing that they are being studied
  • Heisenbug of computer programming, where a software bug seems to disappear or alter its behavior when one attempts to study it
  • Observer effect (information technology), the impact of observing a process while it is running
  • Observer effect (physics), the impact of observing a physical system
  • Probe effect, the effect on a physical system of adding measurement devices, such as the probes of electronic test equipment
  • Observer-expectancy effect, a form of reactivity in which a researcher's cognitive bias causes them to unconsciously influence the participants of an experiment

It may also refer to:

See also