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Jonathan Arthur Schmidt; Gisa Aschersleben; Anne Henning – International Journal of Behavioral Development, 2025
In this longitudinal study, we investigated the factor structure and stability of early-life temperament in a German sample, using three measures developed within Rothbart's psychobiological approach. Temperament was measured using the Infant Behavior Questionnaire Revised (IBQ-R) at the ages of 6 and 12 months, the Early Childhood Behavior…
Descriptors: Foreign Countries, Personality, Personality Measures, Infants
Gartstein, Maria A.; Hancock, Gregory R. – Merrill-Palmer Quarterly: Journal of Developmental Psychology, 2019
Temperament growth has been examined in infancy, but the spectrum of reactive and regulatory dimensions was not previously considered. We evaluated linear and nonlinear growth trajectories for overarching factors and fine-grained indicators of infant temperament obtained via parent report (N = 143) at 4, 6, 8, 10, and 12 months of age.…
Descriptors: Infants, Personality Development, Gender Differences, Socioeconomic Status

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