This is why maintaining situational awareness is critical. See the summary of tactical and situational skills above. Stress produces numerous physical and mental symptoms which vary according to each individual's situational factors. Still, effectiveness can vary depending on the situational context. This theory is a combination of trait and situational approach. Gopnik explains that hockey reveals and rewards situational and spatial intelligence like no other sport. Some theorists started to synthesize the trait and situational approaches. Implicit stereotypes are activated by environmental and situational factors. Prosocial behavior is mediated by both situational and individual factors. The mobility, sustainability and situational awareness have also been improved. These factors range from causal to effectual and focus on group and situational aspects. The model explained the conditions under which people will make informed dispositional versus situational attributions. Dewey placed pragmatism above moral absolutes and helped give rise to situational ethics. "Workplace violence has combination of situational and personal factors". Another exegesis of the story is the importance of situational awareness.