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The observer-expectancy effect [a] is a form of reactivity in which a researcher's cognitive bias causes them to subconsciously influence the participants of an experiment. Confirmation bias can lead to the experimenter interpreting results incorrectly because of the tendency to look for information that conforms to their hypothesis, and ...
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
The observer-expectancy effect is when a researcher's expectations cause them to subconsciously influence the people participating in an experiment. It is usually controlled using a double-blind system , and was an important reason for the development of double-blind experiments.
Ambiguity effect; Assembly bonus effect; Audience effect; Baader–Meinhof effect; Barnum effect; Bezold effect; Birthday-number effect; Boomerang effect; Bouba/kiki effect
Inherent in conducting observational research is the risk of observer bias influencing your study's results. The main observer biases to be wary of are expectancy effects. When the observer has an expectation as to what they will observe, they are more likely to report that they saw what they expected. [7]
Examples of observer bias extend back to the early 1900's. One of the first recorded events of apparent observer bias was seen in 1904, with the case of "Clever Hans". Clever Hans was a horse whose owner, Wilhem von Olson, claimed could solve arithmetic equations. Von Olson would ask Clever Hans a series of questions involving arithmetic ...
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Observer effect (information technology) (computer programming) Observer effect (physics) (physics) Observer-expectancy effect (cognitive biases) (cognitive psychology) Occlusion effect (biology) (otology) Octave effect (effects units) Okorokov effect (physics) Oligodynamic effect (biology and pharmacology of chemical elements)