The interfaces developed by this study utilized elements of the existing school curriculum that the children were already familiar with, which decreased their cognitive burden when they were attempting to understand the thematic structure.
Children understood some parts of the interface structure, but appeared to be uncertain as to the placement of the information nodes. As a result, they adopted browsing as a strategy to find their exact target. They were then able to develop a search strategy (VZ3 in 2D, MV2 in 3D) for their next move. Children with limited vocabulary use the
space efficiency (which allows for information accessibility), and precision, effectiveness (which influences information diagnosticity) as the most important criteria in their search. Children spent less time when using the 2D interface than they
did when using the 3D interface, and applied an exhaustive approach. Thus the cognitive burden associated with the 3D interface outweighs its convenience for information accessibility; however, in terms of information diagnosticity, increased
convenience outweighs the cognitive burden brought by a 3D interface.