Human Growth and Development / Unit 3 HGD 0344 short lesson, about 20 seconds
The Cat in the Hat Study
Captions available
The idea
In DeCasper and Spence's study, mothers read The Cat in the Hat aloud during pregnancy, and their newborns sucked harder to hear it.
In practice
A pacifier wired to a speaker: faster sucking plays the familiar story.
Where people slip
Unexposed newborns showed no preference. The high-amplitude sucking technique measures what infants prefer by how hard they suck.
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