experimenter bias

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Related to experimenter bias: Hawthorne effect
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Noun1.experimenter bias - (psychology) bias introduced by an experimenter whose expectations about the outcome of the experiment can be subtly communicated to the participants in the experiment
psychological science, psychology - the science of mental life
bias, prejudice, preconception - a partiality that prevents objective consideration of an issue or situation
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References in periodicals archive ?
It has been argued (Van Casteren & Davis, 2007), that a fully automated procedure to select stimuli is desirable to avoid the experimenter bias described by Forster (2000).
This paper critically examines the methodology of informal experiments employed in ordinary language philosophy and much of contemporary philosophy of language and linguistics, and discusses the role that experimenter bias can play in influencing judgments about informal and formal linguistic experiments.
By tightly controlling procedures and observations, experimenters make sure that their data are as unaffected as possible by experimenter bias.
The AAP admits as much by saying that "key studies to date have been performed in African populations with HIV burdens that are epidemiologically different from HIV in the United States." Moreover, the African studies were closer to a lowest common denominator than a "gold standard," suffering from numerous critical flaws including selection bias, randomization bias, experimenter bias, inadequate blinding, supportive bias, participant expectation bias, lack of placebo control, inadequate equipoise, attrition of subjects, failure to investigate non-sexual HIV transmission, lead time bias, and time-out discrepancy.
As such, there may have been an effect of experimenter bias on the outcome of the behavioral measure.
Spelke dismisses the study, noting that it was not peer reviewed, has never been replicated, and did not control for experimenter bias. She notes that many better designed studies consistently show that male and female infants respond to objects and people equally.
Despite a few threats such as experimenter bias, pre-test treatment interaction, and instrumentation, the study is significant.
A number of conclusions drawn from the reviewed studies were unfounded because the experimenters inferred causation from correlation, lacked standardized measures, had poor sampling procedures, failed to control for threats to validity, had very limited assessment of anxiety, had experimenter bias, and had poor operationalization of religious constructs.
(3) 'Experimenter bias', first noted by Rosenthal in the 1960s, has been widely confirmed.