The Role of Sleep in Retention of New Words in Habitually and Non-Habitually Napping Children.

Daytime napping contributes to retention of new word learning in children. Importantly, children transition out of regular napping between ages 3-5 years, and the impact of this transition on memory is unclear. Here, we examined the performance of both non-habitually napping children (nap 0-3 days per week, = 28) and habitually napping children (nap 4-7 days per week, = 30) on a word learning task after a delay including either sleep or wakefulness.