While encouraging, these findings suffer from some shortcomings: the lessons are all in one topic area, and the narration is, from the outset, conceived with animation accompaniment in mind, which may unfairly represent the other formats. This is a general enigma of media comparison studies; if you use the same material in all contexts, it may skew in favor of the context for which it was originally designed. If you don’t use the same material you cannot guarantee uniformity of experience.