Ever noticed how your voice shoots up a couple of octaves when you see a baby? For most of us, this change in tone is seemingly involuntary. While research varies on whether or not using a baby voice when speaking to your baby is beneficial, they do agree that babies prefer to listen to these high-pitched tones. Let the peekaboos commence!
In a 2015 study by McGill University, Canadian researchers discovered that 6-month-old infants were much more attracted to their own speech patterns than those of adults. The infants listened to "a repeating vowel sound that mimicked those made by an adult woman or those by a baby" using a synthesis tool. Researchers measured the length of each infant's attention span. On average, the infants listened to a fellow baby's vowels 40 percent longer than the adult woman's vowels. It's important to note that the "infant-like vowel sounds that they heard were not yet part of their everyday listening experience." Meaning, the babies weren't partial to their own kind simply out of familiarity. Knowing infants' speech preferences can help us design more effective tools in developing their speech.