Scientific method - Wikipedia, the free encyclopedia
Truth and belief
Main article: Truth
Belief can alter observations; those with a particular belief will often see things as reinforcing their belief, even if they do not.[9] Needham's Science and Civilization in China uses the 'flying horse' image as an example of observation: in it, a horse's legs are depicted as splayed, when the stop-action picture by Eadweard Muybridge shows otherwise. Note that at the moment that no hoof is touching the ground, the horse's legs are gathered together and are not splayed.
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Eadweard Muybridge's studies of a horse galloping
Earlier paintings depict the incorrect flying horse observation. This demonstrates Ludwik Fleck's caution that people observe what they expect to observe, until shown otherwise; our beliefs will affect our observations (and therefore our subsequent actions). The purpose of the scientific method is to test a hypothesis, a belief about how things are, via repeatable experimental observations which can contradict the hypothesis so as to fight this observer bias