Clara and William Stern kept a diary (Tagebuch) on the psychological development of their three children, Hilde, Günther and Eva, born in 1900, 1902 and 1904 respectively. A first major publication based on these diaries was Clara & William Stern's Die Kindersprache (1907), which became a classic in the language acquisition literature. The accessibility of the Stern diaries, however, hasn't been optimal. It was Werner Deutsch of the Max Planck Institute for Psycholinguistics in Nijmegen who, with Eva's unremitting support in Jerusalem, had the full diaries transcribed. Since then they have been electronically available through the Max Planck Institute.
- Plese read the full introduction by Pim Levelt.