Answer:
Correlational and longitudinal.
Step-by-step explanation:
The design of this study is a correlational and longitudinal study. It is a longitudinal study because as a researcher I'm going to be looking at the variables of interest every 6 months for a period of 5 years. A longitudinal study is one that is done over a period of time. And I will be checking for the correlation between relationship satisfaction and depression In this period of time.