Week 3 Flashcards
Attention
What is source separation?
Isolating individual sound sources from mixed audio signals `
What is the problem with source seriation?
Sometimes multiple sounds overlap, making it hard to distinguish
What is a low level representation?
Detailed, fine grained ending of information that is close to raw sensory input
What is high level representation?
Abstract, conceptual encoding that captures meaning rather than raw data
What is bottom up processing?
When raw sensory input slowly is interpreted into deeper conceptual meaning without prior knowledge?
What is top down processing?
When perception is guided by prior knowledge, expectation, and context rather than just sensory input
What is attention?
A filter that determines which information gets through for further processing
What is change blindness?
When you don’t notice an otherwise obvious stimuli due to being overly focused on something else
What is salient stimuli?
Stimuli that stands out (ex: recognizing when someone says your name in the middle of multiple people talking)
What the early selection model?
A source is selected before further processing
What is early selection model with an attenuator?
Main sources are selected before higher level processing, but salient stimuli can still be responded to
What is the late selection model?
All sources are processed into higher-level representations and source your respond to is selected after further processing
What is functional boxology?
The creation and study of diagrams created to understand selection models
What is perceptual load?
Depending on how demanding the task is, your brain will have a varied need to filter out distractions
High perceptual load: brain filters distractions with demanding task
Low perceptual load: brain has room to attend to multiple stimuli
What happened in Lavie’s experiment?
She creates low perceptual load alphabet identifying tasks and high perceptual load alphabet identifying tasks, and the distractors were more effective for low load bc they held more weight, whereas in higher load they were immediately filtered out
What type of distractor was most effective during low perceptual load?
The incompatible distractor (other qualifying letter) was more distracting then neutral (same letter) or compatible (unqualifying letter)
What type of distractor was most effective during high perceptual load?
None of them
When do late selection and early selection models get used?
Late selection gets used with low perceptual load, early selection gets used with high perceptual load
