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Reliability may be improved by clarity of expression (for written assessments), lengthening the measure, [9] and other informal means. However, formal psychometric analysis, called item analysis, is considered the most effective way to increase reliability.
Triangulation will considerably increase the confidence in a study tremendously. There are a few ways triangulation can occur, including the use of multiple observers, which is a form of reliability in itself called interobserver reliability, measured by the percentage of times that the observers agree.
If we recover the words in the former way, we shall probably know them the next time; if in the latter way, we shall very likely need the book once more." [ 10 ] The first documented empirical studies on the testing effect were published in 1909 by Edwina E. Abbott [ 11 ] [ 12 ] which was followed up by research into the transfer and retrieval ...
The authors emphasized that the findings reflect a problem that affects all of science and not just psychology, and that there is room to improve reproducibility in psychology. In 2021, the project showed that of 193 experiments from 53 top papers about cancer published between 2010 and 2012, only 50 experiments from 23 papers could be replicated.
For the reliability of a two-item test, the formula is more appropriate than Cronbach's alpha (used in this way, the Spearman-Brown formula is also called "standardized Cronbach's alpha", as it is the same as Cronbach's alpha computed using the average item intercorrelation and unit-item variance, rather than the average item covariance and ...
Poffenroth tells Yahoo Life that too many distractions cause our amygdala (the brain’s fear center) to become overactive, making it harder to focus.Additionally, she says stress hormones play a ...
Kappa is a way of measuring agreement or reliability, correcting for how often ratings might agree by chance. Cohen's kappa, [ 5 ] which works for two raters, and Fleiss' kappa, [ 6 ] an adaptation that works for any fixed number of raters, improve upon the joint probability in that they take into account the amount of agreement that could be ...
Some researchers in psychology indicate that the replication crisis is a foundation for a "credibility revolution", where changes in standards by which psychological science are evaluated may include emphasizing transparency and openness, preregistering research projects, and replicating research with higher standards for evidence to improve ...
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