+**Observer bias** is a cognitive distortion where an observer's expectations or beliefs subtly influence their perception or interpretation of an event or data. This can lead to skewed results in research, highlighting the need for methods like [Blinding](/wiki/blinding) to maintain [Objectivity](/wiki/objectivity).
+## See also
+- [Confirmation Bias](/wiki/confirmation_bias)
+- [Experimenter Effect](/wiki/experimenter_effect)
+- [Cognitive Bias](/wiki/cognitive_bias)
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