Dayton Shooting In a mass shooting in Dayton, a man opened fire on the crowd, once again sparking an outcry for gun control. Psychologists argue that surviving a mass shooting event is one of the few experiences that are powerful enough to change one's opinion about gun control. To test that claim, we measured the support level for gun control of several Dayton residents, none of which ever experience a mass shooting. We also measured support levels for all survivors of the shooting. Use the data on the Dayton tab to test this claim