Dr.Leigh conducted the following study.Following IRB approval, she identified parents of 40, 1-year-old children.She divided the families randomly into two groups of 20 and gave the infants in Group A educational CDs to listen to each night, and Group B received classical music CDs.After a week, she had the parents fill out a questionnaire rating how much they believed their children's IQ had risen.Clearly specify the type of study this is and the independent and dependent variables.Also, what happens if both groups show improvement? What could Dr.Leigh have done differently?

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The Answer of Dr.Leigh conducted the following study.Following IRB approval, she identified parents of 40, 1-year-old children.She divided the families randomly into two groups of 20 and gave the infants in Group A educational CDs to listen to each night, and Group B received classical music CDs.After a week, she had the parents fill out a questionnaire rating how much they believed their children's IQ had risen.Clearly specify the type of study this is and the independent and dependent variables.Also, what happens if both groups show improvement? What could Dr.Leigh have done differently?

DrLeigh Conducted the Following Study