Hierarchical semantic organization in 6-year-olds

Fifty-eight first graders saw eight pictures of things familiar to them. Subsequently they attempted to recall each picture given as retrieval cues the corresponding noun and four other words. Each set of cue words mapped onto a tree-like, class-inclusion structure. Five predictions based on a model of semantic distance in the structure were confirmed. Contrary to what might have been expected from previous research, the results suggest that class-inclusion hierarchies can serve as the functional basis for retrieving information in children as young as 6 years old.