摘要: Abstract This study examines the interpretation that under reduced conditions of observation perceived size an object is result a direct response to retinal size. In opposition this size-distance invariance hypothesis stating results from only when appropriate distance also present. Four experiments were conducted. The first two indicate in absence cues, proportional last suggest consequence tendency, conditions, perceive objects at common (specific) distance. support and are perception possible significance specific tendency discussed for binocular as well monocular observation.