Is it just because the brain is filling in the gaps?
In: Biology
You seem to be describing the phenomenon of “chronostasis”, which is also the cause of the stopped clock illusion.
The basic idea is that our eyes will switch points of focus by rapidly moving in an event called a “saccade”. During a saccade the sensory information from the eyes is likely to be blurry, difficult to process, and generally confusing and unhelpful. So the brain in predictable evolutionary lazy kludge just *doesn’t process it*, throwing it out as too much trouble to bother with.
So we actually go blind for a split second, but the rest of our brain doesn’t like that. Instead it decides to lie to us, covering the gap by filling in temporally adjacent sensory information. With the stopped clock illusion the sort of opposite effect occurs, where you look at a clock just after the second hand has moved and it seems like the next movement takes a longer time to occur than it should. This is because the brain filled in the saccade with the view of the clock, making you believe you were seeing the same thing since the start of the saccade when you were actually blind.
A similar sort of thing could occur with saccades and video frames, where you think you see a frame for longer than you do because it is filling in that blindness gap.
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