Most of the regular waking cognition experiences a continuous visual field. One object of focus flows into another. Objects out of focus are pushed to the periphery. A person may move one's view around in a 360 degree sphere, but from a single point in space. For example, moving eyes away from the monitor towards the desk keeps the monitor in the field of view, just moves it to the periphery.
Now, as I'm looking at modern day (2012) movies and commercials, I notice that a lot of them feature abrupt changes from one image to another, from one camera angle to another. It is as if the perspective shifts about in space.
Quite a lot of these image changes are very brief - just a few seconds long. For example, a conversation on screen may have camera on one actor talking, then jump to show the other actor's reaction, then snap back. Commercials are even worse - if viewed out of the corner of one's eye, they frequently appear as just a series of flashes.
I'm interested if there's any science behind these abrupt changes in camera angles and flashes of images. For example, I know that a human eye needs about 25 frames per second to perceive fluid motion on the screen. A refresh rate of 60 hertz is the minimum to avoid eye strain. Are there any similar numbers related to the duration of exposure to the stimulus, for example(fake numbers):
- 0.75 seconds to capture emotion on the human's face
- 2 seconds to comprehend action (ex: car driving on screen)
- 3 seconds flash of explosion is enough to produce excitement
- 14 seconds to become familiar with the scene