People are more likely to remember points from talks that are accompanied by gestures. This effect apparently increases with time.
What does the effect of time have on increased lengths? Does it continue to increase and then decrease at some point? Anecdotally I often recall quotes and instances from movies based on movements that I make.
What effects, if any, are seen in studies of mirror-neurons and those with impairment of them? What memory effects might be seen with those on the autism spectrum who don't have strong mirror-neuron responses? If this is impaired, what might account for their improved memories for some types of material? Which types of material do they have improved memories for?
Is the same true of drawing points from a speech using the ideas of sketchnotes? Is drawing an extension of gestural improvement of memory?