Effect size
True or False:
Cohen’s d is the only way to measure effect size?
False
True or false: Effect sizes are independent of the sample size
True, because the effect stays the same no matter how many people are in the study, but having more participants makes it easier to detect the effect
True or False: Dietary intake was measured through 3-day food records.
False (24-hr recalls)
What does the effect size Cohen's d=0.8 mean?
Large effect
what does the effect size Cohen's d=0 mean?
No effect
True or False: The intervention in the article was geared towards students in grades 1-4
True
What would a negative Cohen’s d value mean?
Negative effect size would mean there was a decrease in the desired outcome
True or false: P-values tell us the magnitude of difference between two groups and its practical implications
False
How long in hours did the teachers participate in the intervention?
72 hours
What is the effect size using Cohen’s d given the following.
Control group: 3
Intervention Group: 16
SD: 18
0.7
What are 2 other methods of calculating effect size?
Any 2 of:
glass delta method, hedges' g, Cohen's f2, Cramer's v, Pearson’s r, r squared coefficients of determination, Odds ratio and Relative risk.
True or False?
One of the limitations of the study was that there was an anti-obesity program going on in both the intervention and control schools.
False, to the researchers knowledge there was no anti-obesity program at the time of the intervention.