Word learning is a lifelong activity constrained by cognitive biases that people possess at particular points in development. Age of acquisition (AoA) is a psycholinguistic variable that may prove useful toward gauging the relative weighting of different phonological, semantic, and morphological factors at different phases of language acquisition…

Describes a study designed to clarify the relationships among young children's age, reasoning ability, ability to add regular and irregular plurals to real and nonsense count nouns and testing methods. Discusses age as a factor employed to indicate how the use of plurals changes over time. (MES)