Here's me making good use of my BA in Psychology from Fancy Women's Liberal Arts College. This morning I happened to notice an article on Gather.com by Effie Orfanides called " 'Breaking Dawn' teaser trailer has fans crazy!"
Orfanides goes on to admit it's a fan-made trailer and that the official film trailer will be released closer to Breaking Dawn Part 1's November 2011 release date.
Here's the cool cognitive psych part: even though you know for a fact this "trailer" is made with clips of the other 3 Twilight movies, interspersed with clips of actors who are not Robert Pattinson and Kristen Stewart, the way the human brain works will still cause your mind to interpret these images as a unified whole, making it seem authentic.
Try it on this clip, another fan-made from the one Orfanides mentions in her article, but one which I think is of better quality.
Did you fool yourself? If so, here's why: we perceive stimuli, not according to their individual characteristics, but organized in groups of information. It would take too much time and brain power to perceive every mental image individually, so our brains have created shortcuts.
One of those shortcuts in closure. You hear someone say "Shut the" and you shut the door, even though you never heard the word "door." Your mind fills in gaps with information that should logically go there.
Other shortcuts include continuity and contiguity. Continuity allows you to perceive short film clips as a unit. (Count the number of cuts in a 30-second commercial. There are many. TV relies on the principle of continuity.) Contiguity ensures that you'll perceive stimuli--again, video clips in this case--as belonging together simply because they are near each other in space and time.
Pretty cool, huh?