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QLDPsychologyQuick questions

Unit 3: Individual thinking

Quick questions on Perception and attention: bottom-up, top-down processing and selective attention (QCE Psychology Unit 3)

3short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.

What is bottom-up processing?
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Bottom-up processing (data-driven processing) begins with the raw sensory input and builds upward into a perception, feature by feature. The stimulus drives the perception. When you encounter a completely novel object with no expectations, you rely heavily on bottom-up processing, assembling edges, colours and shapes into a whole. It is accurate but relatively slow.
What is top-down processing?
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Top-down processing (concept-driven processing) uses existing knowledge, context and expectations to interpret sensory input quickly. Your brain predicts what is likely to be there and fills gaps. This is why you can read text with jumbled internal letters, or hear a muffled word correctly because the sentence makes its meaning obvious.
What is selective attention?
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Attention is the process of focusing cognitive resources on particular stimuli while ignoring others. The capacity of awareness is limited, so attention acts as a filter.

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