Scanning visual images
The time needed for subjects to describe mental images corresponds to the time it would have taken them to scan an actual picture. Conclusion: internal images have special properties analogous to those external images.
Subjects were requested to memorize a series of pictures and later to imagine the one at a time. They were asked to focus on one end of the imagined picture and to identify a number of its features.

The time needed for subjects to correctly respond corresponded to the time it would have taken them to scan an actual picture.

Conclusion: internal images have special properties analogous to those external images.

Stephen Kosslyn (1973).
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Scanning visual images
Stephen Kosslyn »Stephen Kosslyn
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