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Observer bias is one of the types of detection bias and is defined as any kind of systematic divergence from accurate facts during observation and the recording of data and information in studies. [1] The definition can be further expanded upon to include the systematic difference between what is observed due to variation in observers, and what ...
[1] [2] This bias can take many forms. Some individuals may over-report good behavior, while others may under-report bad, or undesirable behavior. [1] A critical aspect of how this bias can come to affect the responses of participants relates to the norms of the society in which the research is taking place. [2]
Confirmation bias can lead to the experimenter interpreting results incorrectly because of the tendency to look for information that conforms to their hypothesis, and overlook information that argues against it. [1] It is a significant threat to a study's internal validity, and is therefore typically controlled using a double-blind experimental ...
Overconfidence effect, a tendency to have excessive confidence in one's own answers to questions. For example, for certain types of questions, answers that people rate as "99% certain" turn out to be wrong 40% of the time. [5] [43] [44] [45] Planning fallacy, the tendency for people to underestimate the time it will take them to complete a ...
Participation bias or non-response bias is a phenomenon in which the results of studies, polls, etc. become non-representative because the participants disproportionately possess certain traits which affect the outcome. These traits mean the sample is systematically different from the target population, potentially resulting in biased estimates.
In social science research social-desirability bias is a type of response bias that is the tendency of survey respondents to answer questions in a manner that will be viewed favorably by others. [1] It can take the form of over-reporting "good behavior" or under-reporting "bad" or undesirable behavior.
Recall bias is of particular concern in retrospective studies that use a case-control design to investigate the etiology of a disease or psychiatric condition. [ 3 ] [ 4 ] [ 5 ] For example, in studies of risk factors for breast cancer , women who have had the disease may search their memories more thoroughly than members of the unaffected ...
Acquiescence bias can introduce systematic errors that affect the validity of research by confounding attitudes and behaviours with the general tendency to agree, which can result in misguided inference. [2] Research suggests that the proportion of respondents who carry out this behaviour is between 10% and 20%. [2]