Processing attention and question density in computer-based instruction.
Abstract: The effect of density of embedded post-questions on learning from computer-based instruction (CBI) was studied among 90 sixth-graders randomly assigned to three versions of a CBI programme — high density, low density, and no embedded questions. Children made significant achievement gains across each increase in question density, consistent across the continuum of reading ability represented in the study. High question density facilitates student learning from embedded post-questions in CBI and does not appear to seriously diffuse processing attention.
Kealy, W. A., & Sullivan, H. S. (1991). Processing attention and question density in computer-based instruction. British Journal of Educational Psychology, 61, 230-232.