Twins wave and point later than single kids
Those gestures go hand in hand with first words, the researchers report. Twins produce fewer gestures and gesture to fewer objects than other children, says principal researcher Şeyda Özçalışkan, an associate professor in the psychology department at Georgia State University. Language use also lags for twins, and language—but not gesture—is also affected by sex, with girls performing better than boys. “The implications are fascinating,” Özçalışkan says. “It shows that gesture and speech go hand in hand in early development in twins. When one is lagging behind so does the ot...