Psychology: Research Methods

Imagine you were conducting research on the relationship between academic performance (e.g., better grades) and different levels of loudness of music (interval scale) while studying.

The independent variable would dB levels of music; the dependent variable would be academic performance.  Please elaborate on the following:  

• How would you design the study using a correlational design?
• How would you design the study using a quasi-experimental design?
• How would you design the study using an experimental design?

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