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. Author manuscript; available in PMC: 2021 Jun 15.
Published in final edited form as: Curr Biol. 2020 May 18;30(10):R426–R427. doi: 10.1016/j.cub.2020.03.049

Figure 1. Protophone rates in boys and girls.

Figure 1.

(A) 65 boys produced about one protophone per minute more (approximately a thousand more protophones per day) than 35 girls (p < 0.0001). The difference favoring boys applied significantly to both infants at high risk (HR) for autism and infants at low risk (LR). Error bars are 95% confidence intervals. Data pertain only to infants who were awake. (B,C,D) Age analysis revealed that both HR and LR boys produced more protophones at all ages across the first year.