Effects of context variability on 2-year-olds' fact and word learning.

The current study investigated the effects of context variability on 2.5-year-olds' (N = 48) fact and word learning. Children were taught labels or facts for novel objects that were presented on variable or consistent background contexts during training. At test, children were asked to select target items in a context that either matched training contexts or was entirely new. Children learned words at above-chance levels regardless of context variability, and there was no significant difference in learning between children in variable and consistent training conditions. For facts, on the other hand, children demonstrated above-chance target selection only when contexts matched between training and test. In addition, children's immediate target selection was lower in the variable context condition than in the consistent one. However, this difference was not present after a 10-min delay. Results are discussed in terms of why fact learning and word learning may be differentially affected by context variability.