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A retrospective cohort study, also called a historic cohort study, is a longitudinal cohort study used in medical and psychological research. A cohort of individuals that share a common exposure factor is compared with another group of equivalent individuals not exposed to that factor, to determine the factor's influence on the incidence of a ...
Research designs vary according to the period(s) of time over which data are collected: Retrospective cohort study : Participants are chosen, then data are collected about their past experiences. Prospective cohort study : Participants are recruited prior to the proposed independent effects being administered or occurring.
An example of Retroactive Interference would be if one was to memorize a phone number and then after a few moments memorize another phone number, practicing the second phone number more. When the recall of the first phone number is needed, the recollection will be poor because the last phone number was the item practiced the most.
Some research suggests a 'blue retrospective' which also exaggerates negative emotions. Though it is a cognitive bias which distorts one's view of reality, it is suggested that rosy retrospection serves a useful purpose in increasing self-esteem and sense of well-being. [2] [3]
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 ...
The use of a sequence of experiments, where the design of each may depend on the results of previous experiments, including the possible decision to stop experimenting, is within the scope of sequential analysis, a field that was pioneered [13] by Abraham Wald in the context of sequential tests of statistical hypotheses. [14]
A retrospective study, on the other hand, looks backwards and examines exposures to suspected risk or protection factors in relation to an outcome that is established at the start of the study. Many valuable case–control studies, such as Lane and Claypon's 1926 investigation of risk factors for breast cancer, were retrospective investigations.
Scientific researchers into psychic phenomena have long considered retrocognition untestable. To verify an accurate retrocognitive experience, existing documents and human knowledge must be consulted, which raises the possibility that the information was already known contemporaneously.