/5 USMLE Practice Questions 1 / 5 Which research design involves manipulating one variable to determine if it causes a change in another variable? Correlational design Experimental design Observational design Descriptive design 2 / 5 Which of the following is the first step in the research process? Data collection Literature review Hypothesis formulation Identifying the research problem 3 / 5 A hypothesis must be testable and falsifiable. True False 4 / 5 A cross-sectional study is an example of a longitudinal study. True False 5 / 5 What type of research design is typically used to determine causality? Observational study Experimental study Descriptive study Qualitative study Your score is 0%