-- Robert Preidt
MONDAY, Dec. 16, 2013 (HealthDay News) -- Many mothers think
their youngest child is smaller than he or she actually 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 reason why a first child suddenly seems much
larger when a new 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 in the
"Contrary to what many may think, this isn't happening just because the older child looks so big compared to a baby," Jordy Kaufman, of Swinburne University of Technology, in Australia, said in a journal news release.
"It actually happens because all along the parents were under an illusion that their first child was smaller than he or she really was," he said. "When the new baby is born, the spell is broken and parents now see their older child as he or she really is."
In this study, the researchers asked about 750 mothers if they
remembered a sudden change in their first child's size after the
birth of their second child, and 70 percent of the mothers said
The mothers were then asked to estimate the height of their
young children (aged 2 to 6) by placing a mark on a blank wall. The
mothers underestimated the height of the youngest child by nearly 3
inches on average, while height estimates for the oldest child were
"The key implication is that we may treat our youngest children as if they are actually younger than they really are," Kaufman said. "In other words, our research potentially explains why the 'baby of the family' never outgrows that label. To the parents, the baby of the family may always be 'the baby.'"
The U.S. Centers for Disease Control and Prevention looks at
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