He and his wife and collaborator made headlines with their finding that they could communicate with a young ape using the language of the deaf. By Sam Roberts Washoe was 10 months old when her foster ...

Children learn their native language with remarkable ease. This feat has inspired a long-running scientific debate about whether youngsters innately grasp underlying linguistic rules, or grammar, ...

In a darkened room in Rochester, N.Y., a baby girl in a pink onesie peers at a computer screen. Wherever she looks, an eye tracker follows — recording her gaze patterns for future analysis. The baby, ...