Two experiments investigated why preschool children sometimes produce multiple words of a referent, but other times allow only on word. In the first experiment, 3- and 4-year-old children completed a naming task. Children produced on average more than two words per object. In the second, 3- and 4-year-olds learned new words for nameable objects. Children showed a correction effect, yet produced more than two words per object. (Author/VWL)