Students viewed an animation depicting either the process of lightning form
ation or how car brakes work and listened to a corresponding narration desc
ribing the steps. The entire animation and narration were presented at the
same time (concurrent), the entire narration was presented before or after
the entire animation (successive large bites), or short portions of the nar
ration were presented before or after corresponding short portions of the a
nimation for each successive portion of the presentation (successive small
bites). Overall, the concurrent and successive small bites groups performed
significantly better than the successive large bites groups on remembering
the explanation in words (retention), generating solutions to transfer pro
blems (transfer), and selecting verbal labels for elements in a line drawin
g (matching), but they did not differ significantly from each other. Result
s are consistent with a dual-process model of working memory in which learn
ers are more likely to construct connections between words and correspondin
g pictures when they are held in working memory at the same time.