Researchers observed 33 Head Start classrooms and coded the gestures teachers made while reading picture books to 306 four-year-olds. Classrooms where teachers used more meaning-focused gestures — like spreading their arms wide on “huge” — had children with higher end-of-year receptive vocabulary. The hand may open a second channel for kids who can’t yet catch every word.
A 2025 meta-analysis pooling 27 studies and 67 effect sizes found that naps boost declarative memory in early childhood — and the effect size is largest, surprisingly, in 3- to 5-year-olds, exactly the age when parents most often consider dropping the nap.
A six-month follow-up of 325 low-income preschoolers found that outdoor play in the midday window reduced negative emotional lability through better working memory — while morning and evening outdoor play did the opposite. When matters as much as how much.
A review in Current Directions in Psychological Science shows that children aren’t passive recipients of adult speech — they actively learn new words by eavesdropping. In one experiment, 4.5- to 6-year-olds learned words equally well from overhearing a phone call as from being directly taught.
A study of 90 preschoolers in China tracked a dramatic shift in how children handle peer conflict between ages 3 and 5. Regression analysis showed emotional understanding — especially “mental” understanding — explained 69% of the variance in conflict resolution strategies.