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  2. Observer bias - Wikipedia

    en.wikipedia.org/wiki/Observer_bias

    Another key example of observer bias is a 1963 study, "Psychology of the Scientist: V. Three Experiments in Experimenter Bias", [9] published by researchers Robert Rosenthal and Kermit L. Fode at the University of North Dakota. In this study, Rosenthal and Fode gave a group of twelve psychology students a total of sixty rats to run in some ...

  3. Experimenter's regress - Wikipedia

    en.wikipedia.org/wiki/Experimenter's_regress

    In science, experimenter's regress refers to a loop of dependence between theory and evidence. In order to judge whether a new piece of evidence is correct we rely on theory-based predictions, and to judge the value of competing theories we rely on existing evidence. Cognitive bias affects experiments, and experiments determine which theory is ...

  4. Observer effect - Wikipedia

    en.wikipedia.org/wiki/Observer_effect

    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; Observer-expectancy effect, a form of reactivity in which a researcher's cognitive bias causes them to unconsciously influence the participants of an experiment

  5. Observer-expectancy effect - Wikipedia

    en.wikipedia.org/wiki/Observer-expectancy_effect

    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 ...

  6. Category:Experimental bias - Wikipedia

    en.wikipedia.org/wiki/Category:Experimental_bias

    Bias that is introduced at some stage during experimentation or reporting of research. It is often introduced by, or alleviated by, the experimental design . Pages in category "Experimental bias"

  7. Blinded experiment - Wikipedia

    en.wikipedia.org/wiki/Blinded_experiment

    In a blind or blinded experiment, information which may influence the participants of the experiment is withheld until after the experiment is complete. Good blinding can reduce or eliminate experimental biases that arise from a participants' expectations, observer's effect on the participants , observer bias , confirmation bias , and other ...

  8. Scientific control - Wikipedia

    en.wikipedia.org/wiki/Scientific_control

    For example, if the fertilizer was spread by a tractor but no tractor was used on the unfertilized treatment, then the effect of the tractor needs to be controlled. A scientific control is an experiment or observation designed to minimize the effects of variables other than the independent variable (i.e. confounding variables). [1]

  9. Sampling bias - Wikipedia

    en.wikipedia.org/wiki/Sampling_bias

    In statistics, sampling bias is a bias in which a sample is collected in such a way that some members of the intended population have a lower or higher sampling probability than others. It results in a biased sample [ 1 ] of a population (or non-human factors) in which all individuals, or instances, were not equally likely to have been selected ...

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