A Professor Computes the Mean Difference in Exam Scores Before

question 39

Multiple Choice

A professor computes the mean difference in exam scores before and after a lecture as 9.0 ± 14.5 (M_D ± S_D) ,and this difference was significant.What is the effect size for this result using estimated Cohen's d?

• A) d = 0.62 (medium effect)
• B) d = 1.61 (medium effect)
• C) d = 0.62 (large effect)
• D) d = 1.61 (large effect)

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Definitions:

Preparation/Determination

The stage of behavioral change in which individuals ready themselves mentally and possibly physically to make a change.

Exercise Routine

A regimen of physical activities designed and scheduled with the aim of improving or maintaining physical fitness and overall health.

Contemplation

A phase of reflection or deep thought, often preceding a decision or action.

Contemplation Stage

The period in which an individual is aware a change is needed and is actively considering making that change but has not yet committed to taking action.