A Researcher Reports That the Mean Difference in Response Time

question 48

Multiple Choice

A researcher reports that the mean difference in response time to an auditory versus a visual cue is 0.83 seconds,with a pooled sample variance equal to 2.45.What is the effect size for this test using estimated Cohen's d?

• A)d = 0.53;medium effect size
• B)d = 0.53;large effect size
• C)d = 0.34;small effect size
• D)d = 0.34;medium effect size

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