A researcher is interested in studying the effects of differentlevels of distrac

A researcher is interested in studying the effects of differentlevels of distractions none low and highon scores on a test ofvisual memory. Participants are randomly assigned to one of threeconditions no distraction low distraction or high distraction.All participants engage in a test of visual memory. What is theindependent variable? What is the dependent variable? What is thepurpose of random assignment to groups?