Relations over Time among Children's Shyness, Emotionality, and Internalizing Problems.
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Data regarding children's shyness and emotionality were collected at three time points, two years apart (T1: N = 214, M = 6.12 years; T2: N = 185, M = 7.67 years; T3: N = 185, M = 9.70 years), and internalizing data were collected at T1 and T3. Relations among parent-rated shyness, emotionality (parent- and teacher-rated anger, sadness, and positive emotional intensity [EI]), and mother-rated internalizing were examined in panel models. In some cases, shyness predicted emotionality two years later (teacher-rated anger, parent-rated sadness, teacher-rated positive EI) and emotionality sometimes predicted shyness two years later (teacher-rated sadness, parent-rated positive EI, teacher-rated positive EI). Parent-rated shyness and/or emotionality (parent-rated anger and parent-rated sadness) predicted internalizing at T3. Results shed light on developmental relations between emotionality and shyness, as well as processes of risk for, or protection against, the development of internalizing problems.