Cognitive Processes PSY 334. Chapter 3 – Attention. What is Attention?. Attention is the allocation of limited processing resources. Visual features such as shape, color, texture, motion are processed in parallel.
Chapter 3 – Attention
Only the selected information gets through.
Subjects can successfully shadow a message that jumps back and forth between ears.
This means that people can shadow based on meaning, not just physical characteristics.
All information passes through but some is weaker (attenuated).
Decide what to say
Shadow by meaning
Shadow by ear
Activity occurs on the opposite side from the stimulus.
Monkeys showed greater activity while waiting (b) when the original stimulus was on the saccade path.
From Delphine Chedru Spot It! Find the Hidden Creatures.
Which is harder to see?
Blue is attended
Green is attended
Cell fires despite presence of green
Cell firing is greatly reduced despite presence of blue
Right parietal lobe damage prevents subjects from shifting their attention to the other visual field.
The first neglect patient (a) has copied the right sides of both figures, ignoring the left.
The second patient (b, c) neglects the left sides when copying but draws a more complete figure from memory.
Halligan et al, 2003
Spotlight theory – we move our attention to parts of the visual field.
Object-based theory – we move our attention to objects.