PSYC 100 Lecture 3: Chapter 3

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Impossible to be aware of everything in the world at once. Amount of information striking sensory receptors far exceeds what brain is capable of fully processing and assimilating into conscious experience. Nervous system evolved mechanisms to restrict processing subsets of things, places, ideas, or moments in time. Choose which sensory inputs to focus on and which to ignore. Originally studied with dichotic listening and shadowing technique. Early results showed people had very little knowledge of what had been presented in unattended channel. Unattended channel still being processed at some level. Shadowing followed message meaning in some cases. Multitasking distracts brain resources allocated to other tasks from main task. Looking for target in display containing distracting elements. Set size: number of items in visual display. Conjunction search requires separate features (color, shape) be bound together. Attention used to bind features at attended location. Bind one object at a time based on location.

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