This was ONE study done in the UNITED KINGDOM. The British and Americans have very different personalities. And since the results of this "scientific study" based its findings how people react, the results were caused by personality. If such a study were to be done in the USA, it would also need to be done in different areas (such as cities, small towns and rural and straight flat or curvy mountainous), different States (California, Mississippi, Utah, etc.), and at different times (both months and time of day) to be even close to accurate data. They should also check perceived age difference and how fat or slender the bicyclist is because that could make even more difference as to how much space a car or truck driver gives a bicyclist.