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In 2 experiments, students received 2 presentations of a narrated animation that explained how lightning forms followed by retention and transfer tests. In Experiment 1, learners who were allowed to exercise control over the pace of the narrated animation before a second presentation of the same material at normal speed (part-whole presentation) performed better on transfer but not retention tests compared with learners who received the same 2 presentations in the reverse order (whole-part presentation). In Experiment 2, learners who were allowed to exercise control over the pace of the narrated animation across 2 presentations (part-part presentation) performed better on transfer but not retention tests compared with learners who received the same 2 presentations at normal speed without any learner control (whole-whole presentation). These results are consistent with cognitive load theory and a 2-stage theory of mental model construction.
Mayer et al. (Fri,) studied this question.