How many participants do we have to include in properly powered experiments? A tutorial of power analysis with reference tables
Given that an effect size of d = .4 is a good first estimate of the smallest effect size of interest in psychological research, we already need over 50 participants for a simple comparison of two within-participants conditions if we want to run a study with 80% power. This is more than current pract...
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| Format: | Article |
| Language: | English |
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Ubiquity Press
2019-07-01
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| Series: | Journal of Cognition |
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| Online Access: | https://www.journalofcognition.org/articles/72 |