self-selection bias

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self-selection bias

[¦self si¦lek·shən ′bī·əs]
(statistics)
Bias introduced into an experiment by having the subjects decide themselves whether or not they will receive treatment.
References in periodicals archive ?
In trying to handle this, he almost certainly strays into the problems of self-selection, which makes his samples unrepresentative and, in turn, makes it difficult to draw valid conclusions.
The current work will examine the extent to which self-selection bias is present when the title of an experiment is manipulated to highlight relevant variables of interest, such as emotion (Experiment 1) and personality (Experiment 2).
Besides the usual constraints (raL(n) [greater than or equal to] [p.sub.l]aL(n), 0 [less than or equal to] a [less than or equal to] 1, and n [greater than or equal to] 0), the following self-selection constraint must be satisfied (8) (i.e., the pair (a, n) must be such that the high risks prefer the insurance contract designed for them to the contract purchased by the low-risk group):
This research highlights the importance of the self-selection principle as the main tool to achieve an ideal literacy environment in which an individual can develop all of his or her reading potential and show ways in which reading strategies were used to turn the "selected content" into meaningful learning experiences.
Especially among middle-to-upper-income consumers who are becoming more home style-conscious, self-selection of homewares is preferable to receiving hampers containing standard products.
Each EngageOne Video acts as a customer service, sales, and marketing resource as viewers create their own experiences through self-selection of topics and actions relevant to their needs.
Such self-selection does not amount to a true scientific poll.
When consumers also misperceive risk, the problem becomes even more complicated because, while efficient self-selection requires consumers to bear their own harm, accurate signaling of risk requires that firms bear full liability (assuming that firms have better information about product risk than consumers).
It is limited by its lack of validation of gout and cardiac diagnoses and the self-selection bias inherent in using primary care registries, rather than a true population-based cohort.
Randomization is the gold standard for determining the value of medical treatments because it removes self-selection that might skew the findings, warns Campos.
At the same time, the very fact of its non-academic origins might raise some questions about whether the authors might have more fully explored such matters as whether those they interviewed manifested any selection (or self-selection) bias and thus presented a more negative account than might have been the case with a different group of MPs.
He is also keenly aware of the problems of self-selection bias in sampling students who seek tutoring and how this bias can invalidate the numbers we might present showing efficacy.