4 ms·
Can anyone find the effect size in this study? When it is missing, I suspect that it is small, and that in turn leads me to suspect p-hacking.
by omarhaneef 5y ago
Can anyone find the effect size in this study?
When it is missing, I suspect that it is small, and that in turn leads me to suspect p-hacking.
- nialse 5y agoMean and standard deviation for PSQI at the end of the study. Vitamin D group: 6.75 (2.97) Placebo group: 9.73 (3.04) Cohen's D: 0.99 (>0.8 is regarded a large effect size) Side note: The translation "Petersburg’s Sleep Index" instead of "Pittsburgh Sleep Quality Index" just cracks me up though! =)
- omarhaneef 5y agoThanks. That's pretty compelling.