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Contrary to what may be popularly assumed, racing drivers as a group do not have unusually better reflexes or peripheral response time. In this, researchers have noted a strong correlation between racers' psychological profiles and those of fighter pilots. In tests comparing racers to members of the general public, the greater the complexity of the information processing matrix, the greater the speed gap between racers and the public. Tyres called R-Compounds are commonly used in motorsports for high amounts of traction. The soft rubber allows them to expand when they are heated up, making more surface area on the pavement, therefore producing the most traction. Tyre pressure is dependent on the temperature of the tyre and track when racing. Formula B The National Auto Sport Association also provides a venue for amateurs to compete in home-built factory-derived vehicles on various local circuits. The major touring car championships conducted worldwide are the Supercars Champio