In their article entitled “Why Do Little Kids Ask to Hear the Same Story Over and Over?” authors Flack and Horst explained how they tested 3-year-old children and what they learned in terms of "novel words" included in the stories. The researchers discovered that children learn more words from repeatedly reading the same stories than from reading different stories with the same number of exposures to the target words. What happens when all the stories are different? The children learned fewer words. However, researchers wonder whether the children are learning something else when stories are different that has not yet been identified or tested? For now, maybe reading some stories repeatedly and throwing in a new story periodically might be a way to go.
Why Do Little Kids Ask to Hear the Same Story Over and Over? Front. Young Minds. 5:30. doi: 10.3389/frym.2017.00030