Does playing action video games provide more than just entertainment? The authors of the paper "Action- Video-Game Experience Alters the Spatial Resolution of Vision" (Psychological Science : 88-94) concluded that spatial resolution, an important aspect of vision, is improved by playing action video games. They based this conclusion on data from an experiment in which 32 volunteers who had not played action video games were "equally and randomly divided between the experimental and control groups." Subjects in each group played a video game for 30 hours over a period of 6 weeks. Those in the experimental group played Unreal Tournament 2004, an action video game. Those in the control group played the game Tetris, a game that does not require the user to process multiple objects at once. Explain why the random assignment to the two groups is an important aspect of this experiment.
Answer to relevant QuestionsConstruct a diagram to represent the subliminal messages experiment of Example 2.5. Red wine contains flavonol, an antioxidant thought to have beneficial health effects. But to have an effect, the antioxidant must be absorbed into the blood. The article “Red Wine is a Poor Source of Bioavailable Flavonols ...A novel alternative medical treatment for heart attacks seeds the damaged heart muscle with cells from the patient’s thigh muscle (“Doctors Mend Damaged Hearts with Cells from Muscles,” San Luis Obispo Tribune, ...Based on a survey of 4113 U.S. adults, researchers at Stanford University concluded that Internet use leads to increased social isolation. The survey was conducted by an Internet-based polling company that selected its ...An article in the San Luis Obispo Tribune (September 7, 1999) described an experiment designed to investigate the effect of creatine supplements on the development of muscle fibers. The article states that the researchers ...
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