Baby-Directed Speech (AUDIO) Princeton University Your browser does not support the audio element. Caption A mother speaks to her baby at the Princeton Baby Lab, illustrating the shifts in pitch, cadence and timbre between regular speech and "motherese." Credit Courtesy of Elise Piazza/Princeton Baby Lab/Princeton University Usage Restrictions Editorial use only License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.