Baby Illusion.
Many mothers regard their youngest child is smaller than he or she in truth is, according to new research. The finding may help explain why many of these children are referred to as the "baby of the family," well into adulthood. It also offers a vindication why a first child suddenly seems much larger when a unripe sibling is born. Until the arrival of the new child, parents experience what is called a "baby illusion," said the authors of the study, which was published Dec 16, 2013 in the gazette Current Biology.