Material incentive motivation and working memory performance of kindergartners: A large-scale randomized controlled trial.

This study investigated the effect of material incentive motivation on the working memory performance of kindergartners using a large-scale randomized controlled trial covering 7123 children aged 50 to 144 months (M = 75.85 months) from 19 provinces in Thailand. This study measured the working memory of young children using the digit span task.