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Keywords: effect size
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Journal Articles
Collabra: Psychology (2021) 7 (1): 28250.
Published: 04 October 2021
...Elizabeth Collins; Roger Watt Statistical power is key to planning studies if understood and used correctly. Power is the probability of obtaining a statistically significant p-value, given a set alpha, sample size, and population effect size. The literature suggests that psychology studies...
Includes: Supplementary data
Journal Articles
Collabra: Psychology (2021) 7 (1): 28202.
Published: 30 September 2021
...Zoltan Dienes Obtaining evidence that something does not exist requires knowing how big it would be were it to exist. Testing a theory that predicts an effect thus entails specifying the range of effect sizes consistent with the theory, in order to know when the evidence counts against the theory...
Includes: Supplementary data
Journal Articles
Collabra: Psychology (2021) 7 (1): 24087.
Published: 07 June 2021
...Don C. Zhang; Jonathan Wai Research evidence in the social sciences often relies on effect size statistics, which are hard to understand for the public and do not always provide clear information for decision-makers. One area where interpretation of research evidence has profound effects on policy...
Includes: Supplementary data
Journal Articles
Collabra: Psychology (2020) 6 (1): 45.
Published: 29 September 2020
... author and source are credited. See http://creativecommons.org/licenses/by/4.0/ . multiple linear regression R-squared amount of variance explained effect size Multiple linear regression is one of the most used analysis methods within psychological research. The R-Squared ( R 2 ) value...
Journal Articles
Collabra: Psychology (2017) 3 (1): 9.
Published: 29 March 2017
... nonsignificant results. Simulations show that the adapted Fisher method generally is a powerful method to detect false negatives. We examined evidence for false negatives in the psychology literature in three applications of the adapted Fisher method. These applications indicate that (i) the observed effect size...