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To cope with this difficulty [of limited capacity], even a mechanical recognition system must have some way to select portions of the incoming information for detailed analysis.

— Ulric Neisser

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More quotes by Ulric Neisser

Cognitive processes surely exist, so it can hardly be unscientific to study them.

Paying attention is not just analyzing carefully; rather, it is a constructive act... What we build has only the dimensions we have given it.

p. 96; As cited in: A.H.C. Van der Heijden (1996)

If we allow several figures to appear at once, the number of possible input configurations is so very large that a wholly parallel mechanism, giving a different output for each of them, is inconceivable.

To deal with the whole visual input at once, and make discriminations based on any combination of features in the field, would require too large a brain, or too much "previous experience" to be plausible.

The fact that the span of apprehension averages only four or five... probably results from the high rate of encoding. In a tachistoscopic experiment the subject must read the fading icon as rapidly as possible.

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Quote text and notes from Wikiquote: Ulric Neisser (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.