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Anecdotal evidence (or anecdata [1]) is evidence based on descriptions and reports of individual, personal experiences, or observations, [2] [3] collected in a non-systematic manner. [ 4 ] The word anecdotal constitutes a variety of forms of evidence.
The persuasiveness of anecdotal evidence compared to that of statistical evidence has been a subject of debate; some studies have argued for the presence a generalized tendency to overvalue anecdotal evidence, whereas others have emphasized the types of argument as a prerequisite or rejected the conclusion altogether.
A case report is generally considered a type of anecdotal evidence. [2] Given their intrinsic methodological limitations, including lack of statistical sampling, case reports are placed at the bottom of the hierarchy of clinical evidence, together with case series. [3]
An anecdotal generalization is a type of inductive argument in which a conclusion about a population is inferred using a non-statistical sample. [8] In other words, the generalization is based on anecdotal evidence. For example: So far, this year his son's Little League team has won 6 of 10 games.
Anecdotal evidence is an informal account of evidence in the form of an anecdote. The term is often used in contrast to scientific evidence, as evidence that cannot be investigated using the scientific method. The problem with arguing based on anecdotal evidence is that anecdotal evidence is not necessarily typical; only statistical evidence ...
While anecdotal evidence is typically unscientific, in the last several decades the evaluation of anecdotes has received sustained academic scrutiny from economists and scholars such as Felix Salmon, [1] S. G. Checkland (on David Ricardo), Steven Novella, R. Charleton, Hollis Robbins, [2] Kwamena Kwansah-Aidoo, and others. These academics seek ...
Anecdotal cognitivism is often criticised by behaviourists for relying on specific cases as evidence of particular animal behaviour, such as that of Clever Hans. [13] Clever Hans was a particularly clever horse, able to interpret his masters body language while carrying out simple arithmetic and answering various simple questions.
Forensic statistics is the application of probability models and statistical techniques to scientific evidence, such as DNA evidence, [1] and the law. In contrast to "everyday" statistics, to not engender bias or unduly draw conclusions, forensic statisticians report likelihoods as likelihood ratios (LR).