Form perception
When we sense something we do more than just take in light and sound etc. We process the info and turn it into something meaningful. For instance, a million leaves, some bark and branches are perceived as a tree.
A gestalt is a whole sum of multiple parts. The idea is that the whole, the sum of the parts, is greater than the individual parts. We're hardwired to look for the whole.
An example might be a bunch of small squares arranged in a circular pattern. If you asked a person, "What do you see? " they'll likely say, "A circle." They see the whole, not individual squares.
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