Early temperament predicts various aspects of development. In large-scale studies, temperament is often assessed via parental report because naturalistic and structured observations are costly and bear the risk of subject loss. However, the validity of such parental reports has been disputed repeatedly. This article compared parental reports on…

Applying an eye-tracking technique, we tested early verb understanding in 48 infants aged 9 and 10 months. Infants saw two objects presented side by side and heard a verb that referred to a common action with one of these objects (e.g., eating relating to a banana). The verbs were spoken by the parent in an interrogative manner in order to elicit…