By Paul Zak. Excerpts:
"The most important thing you can do to sustain neurologic immersion is to go back to English 101 and always, always, build a narrative arc for your commercial.
A montage of unconnected scenes may seem like a good way to evoke emotional attachment, but our data show that with the montage approach, within 10 to 15 seconds, the brain "gets it" and there is little reason to spend the metabolic energy to continue to be immersed. Low immersion shows that the information is unimportant and will not be remembered.
On the flip side, more immersion means more sales - because the brain values and remembers the content. Your commercial has to grab and grow immersion to be successful. A dramatic arc that introduces characters who face a dilemma that they then resolve keeps the brain immersed and wanting more. The data shows that a complete story arc can be done in as little as 6 seconds, so you don't need Tolstoy to write your script - and we all know you usually have 15 to 30 seconds to get your message across.
Regardless of the time you have, you do need to have product-story congruence. That is, the commercial must weave the product into the dramatic arc in a natural way. Many commercials tell wonderful stories and then just drop a "buy now"at the end. This does not cut it. Tell a story and make your product part of the plot."
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stories rule and unrelated quick cuts drool. Client data show that nostalgic ads without a story do not sustain immersion and have little impact on sales.
Nostalgic stories, yes. Nostalgia because you think it looks pretty, no."