https://schooling-frontier.pages.dev/tags/infant-directed-speech/ Recent content in Infant-Directed Speech on Schooling Frontier Hugo en Wed, 09 Sep 2026 00:00:00 +0900 https://schooling-frontier.pages.dev/posts/why-your-pitch-rises-on-a-new-word/ Wed, 09 Sep 2026 00:00:00 +0900 https://schooling-frontier.pages.dev/posts/why-your-pitch-rises-on-a-new-word/ A Dutch longitudinal study of 49 mother-child pairs found that how a mother stretched her pitch range when introducing an unfamiliar word at 18 months predicted vocabulary growth to 24 months with striking strength — while the same prosodic exaggeration on familiar words predicted nothing at all.