Though we can not necessarily specifically quantify the amount of information that we can expect to store a certain type of stimulus will provide, valid research has indeed shown that different types of multimedia, when coupled with other forms, are more effective than these same types of media in isolation. That said, there are certainly general guidelines to follow when combining certain types of audiovisual stimuli that allow for greater and easier encoding into long-term memory. Though we will not provide a comprehensive list of those guidelines here, a representative example found in the text is what Richard Mayer, Roxanne Moreno, "and others" call the "Spatial Contiguity Principle," which stipulates that "[s]tudents learn better when corresponding words and pictures are presented near each other rather than far from each other on the page or screen." Another, the "Coherence Principle," states that "[s]tudents learn better when extraneous words, pictures, and sounds are excluded rather than included" (12). The latter principle is somewhat obvious, as irrelevant clutter on a screen make it more difficult for students to focus on encoding select information on that screen.
Ultimately, this study concluded that properly-designed multimodal learning has a positive effect on both interactive and non-interactive forms of learning, an effect that ultimately promotes learning in both of these forms greater than traditional, single-mode learning such as text analysis (13). Yet simply because a teacher incorporates multimedia into his/her teaching does not mean that such teaching is effective. It is important to consider the goals of the lesson, and in turn which type of stimulus (or combination of them) is most effective for achieving those goals. For example, a documentary with live footage may better serve to illustrate the famous march from Selma to Montgomery during the American Civil Rights Movement than would a Powerpoint presentation with pictures alongside a narrative account. Of course, there are some occasions where specific skills need to be built around a single type of stimulus. A good example of this would be a textual analysis of a primary historical document such as a census record. In sum, there are certain times and places that certain types of multimedia should be used. It is important for teachers to have a clear rationale for using a specific combination of multimedia resources when teaching a lesson, but it is similarly important for teachers to realize that a variety of stimuli, when used properly, are naturally more effective than single-mode learning.
To the group, I would ask you (in addition to responding to that which I have written above) to provide one or two examples of a good use of multimedia in teaching a lesson in your content area. Defend your choice of media.