Researchers studying Piaget's concept of object permanence showed infants as young as 3 months a possible event (a solid screen moved to hide a Teddy bear, then moved again to reveal the teddy bear) and an impossible event (a solid screen moved to hide the teddy bear, then moved again showing that no teddy bear was present). These infants showed:
- More surprise at the possible than at the impossible event.
- were about equally surprised at both events.
- more surprise to the impossible than at the possible event.
- none of these options