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  2. Observer effect (physics) - Wikipedia

    en.wikipedia.org/wiki/Observer_effect_(physics)

    In physics, the observer effect is the disturbance of an observed system by the act of observation. [1] [2] This is often the result of utilising instruments that, by necessity, alter the state of what they measure in some manner. A common example is checking the pressure in an automobile tire, which causes some of the air to escape, thereby ...

  3. Observer effect - Wikipedia

    en.wikipedia.org/wiki/Observer_effect

    Observer-expectancy effect, a form of reactivity in which a researcher's cognitive bias causes them to unconsciously influence the participants of an experiment Observer bias , a detection bias in research studies resulting for example from an observer's cognitive biases

  4. Observer (quantum physics) - Wikipedia

    en.wikipedia.org/wiki/Observer_(quantum_physics)

    The observer has, rather, only the function of registering decisions, i.e., processes in space and time, and it does not matter whether the observer is an apparatus or a human being; but the registration, i.e., the transition from the "possible" to the "actual," is absolutely necessary here and cannot be omitted from the interpretation of ...

  5. If a tree falls in a forest and no one is around to hear it ...

    en.wikipedia.org/wiki/If_a_tree_falls_in_a_forest...

    The anthropic principle suggests that the observer, just in its existence, may impose on the reality observed. However, most people, as well as scientists, assume that the observer doesn't change whether the tree-fall causes a sound or not, but this is an impossible claim to prove.

  6. Hawthorne effect - Wikipedia

    en.wikipedia.org/wiki/Hawthorne_effect

    The Hawthorne effect is a type of human behavior reactivity in which individuals modify an aspect of their behavior in response to their awareness of being observed. [1] [2] The effect was discovered in the context of research conducted at the Hawthorne Western Electric plant; however, some scholars think the descriptions are fictitious.

  7. Double-slit experiment - Wikipedia

    en.wikipedia.org/wiki/Double-slit_experiment

    [90]: 41–54 Moreover, the act of "observing" or "measuring" an object is irreversible, and no truth can be attributed to an object, except according to the results of its measurement. In the Copenhagen interpretation, complementarity means a particular experiment can demonstrate particle behavior (passing through a definite slit) or wave ...

  8. Relativity of simultaneity - Wikipedia

    en.wikipedia.org/wiki/Relativity_of_simultaneity

    Assume that the first observer uses coordinates labeled t, x, y, and z, while the second observer uses coordinates labeled t′, x′, y′, and z′. Now suppose that the first observer sees the second observer moving in the x-direction at a velocity v. And suppose that the observers' coordinate axes are parallel and that they have the same ...

  9. Observational learning - Wikipedia

    en.wikipedia.org/wiki/Observational_learning

    Observational learning leads to a change in an individual's behavior along three dimensions: An individual thinks about a situation in a different way and may have incentive to react to it. The change is a result of a person's direct experiences as opposed to being in-born. For the most part, the change an individual has made is permanent. [10]