Overall, across the three scoring measures in the study, fine-grained performed 22.2% better than the blocked group and 8.4% better than the medium-grained group. The fine-grained group, with their “micro” content and frequent assessment questions, fared better than both competing groups in every category. From this study, it would appear that bite-sized content is, indeed, better.
The researchers mentioned two dynamics potentially in effect. First, the larger amount of material and questions given to the blocked group might have “put greater demands on learners,” resulting in them having to do more work to “access necessary information from their memory.” In other words, stockpiling information slowed down the process of retrieving it. Sounds familiar.
Second, the blocked group could have suffered from having less feedback than the medium and fine groups: “Longer study phases without learning questions may lead to uncertainty about whether they have understood all relevant content or not.”