ANOVA Results for Experiments – Overall Effects and Effect Sizes Statistics

Sample Paper Excerpt

An author conducted an experiment with one control group and 2 different levels of a treatment effect. The results were summarized by reporting that the overall F-statistic and the test statistics and p-values for two separate contrasts testing whether the two treatment effect groups were equal to the control group.

How should the author report the findings?

The author should report the effect sizes.
The author should report just the confidence intervals for any effect sizes.
The author should report both effect sizes and confidence intervals for those effect sizes.
The author does not have to report either effect sizes or confidence intervals for those effect sizes since the tests for the contrasts were presented.

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