Mass Is All That Matters in the Size–Weight Illusion

摘要: An object in outer space is weightless due to the absence of gravity, but astronauts can still judge whether one heavier than another by accelerating object. How heavy an feels depends on exploration mode: perceived as when holding it against pull gravity it. At same time, perceiving object’s size influences percept: small objects feel large with mass (size–weight illusion). Does this effect depend perception gravity? To answer question, were suspended from a long wire and participants asked push rate its heaviness. This way contribution gravitational forces percept was minimised. Our results show that weight not at all necessary for illusion because size–weight occurred without weight. The magnitude independent inertial or perceived. We conclude does prior knowledge about weights object, instead more general objects, gravity. Consequently, will have Earth should Moon even under conditions weightlessness.