Imagination’s Limit: Humans Can Track Only One Moving Object
A new study finds the human imagination can reliably simulate the path of a single invisible moving object but struggles to keep track of two at the same time, a result that surprises researchers and has practical implications for teaching, safety and design in Thailand. The experiments, described in Nature Communications, used short animations of bouncing balls that vanished from view and asked participants to predict where and when those objects would hit; people performed well with one disappeared ball but fell to near chance with two, supporting a serial “one-at-a-time” model of mental simulation rather than a parallel one (Nature Communications PDF). The finding suggests that while our eyes and attention can monitor a handful of visible moving objects, the mind’s eye has a much narrower working capacity when it must continue motion after objects drop out of view (Harvard Gazette report).