Mother–Child Synchrony and Behavioral Problems in Chinese Children: A Preliminary fNIRS‐Hyperscanning Study. - Liu, Chao; Liang, Xi; Meng, Xiaoxu; Cheng, Nanhua; Lu, Shan; Bai, Liu; Song, Bingbing; Lu, Chunming; Wang, Zhengyan (Brain & Behavior, 2026)