Exam 1 Flashcards
Subjective vs Objective
Subjective - Internal interpretations
Objective - True external Stimuli as it were
Top down vs Bottom up
Top down - Using memory context to process external stimuli
Bottom up - Using external stimuli immediately
Illusions
A way to investigate the subjective nature of perception
Gestalt principles
Organizations of systems changes perceptions
Figure ground
Being able to identify shapes within shapes, chalice or faces
Continuity
Things that move in a line are perceived to be a continuation of each other even if they’re separate shapes
Inclusiveness
Shapes within shapes
Proximity
Percieve things as together when theyre close
Similarity
similar things are grouped
Closure
lines that make up a shape, even when theyre not making up the whole shape
Illusory Contours
Perceived edges made up of shapes
Lateral inhibition
Activation of Photoreceptive fields in illusions, fake gray dots
Photoreceptive field
Area where photoreceptors get their stimuli
Direct Perception
Gibsonian Approach, more bottom up processing than Gestalt
Perceptual array
All of your senses add to your perception
Optic Flow
Ability to detect apparent motion
Invariant
Structure in the array of perceptual information that specifies state of the world
Expansion of the optic array
Eyes get wider as things approach
Occlusion
Depth cue when an object blocks another, we understand its still there
Size constancy
Relative size comparison
Affordance
Relationship of the self to the environment that enables action
Visual Cliff
Baby fall teehee
Pattern recognition
Plays into a more Top-Down approach to perception, needed to make sense of the world, schema
Template theory
We make sense of the world through past experiences with those specific objects; we see one chair and only know that as “a chair”, not the concept of it
Feature analysis
People see a set of “critical” features
Recognition by Component theory
Decomposing objects by smaller, simpler shapes (geons)
Face perception
Developemental
Orientation
Neurological evidence
Geons
simple 2d or 3d shapes
Prosopagnosia
Face Blindness, temporal lobe
Agnosia
Inability to process specific sensory information
Point light displays
Experiment where we assumed we can detect patterns through motion
Two pathways of perception
What - Ventral part of the brain: recognizes objects
Where - Dorsal part of the brain: spatial awareness of objects, landmark study
Speech segmentation
Space in-between words to differentiate them
Unconscious Inference
We infer how objects “are” in the world by how much it makes sense
Scene schema
Items have context when visualized
Selective Attention
Choosing what to pay attention to
Divided attention
Attempting to pay attention to multiple stimuli at once
Cocktail party effect
Being able to single out a voice or stimuli in the midst of many
Dichotic Listening
Different stimuli directly into each ear
Shadowing
Repeating words as they are heard in the dichotic listening task
Attended
Stimuli that is actively wanting to be processed
Unattended
Everything else that is not consciously being payed attention to
Subliminal
Type of unconscious stimuli that is too fast/quiet to consciously be perceived
Early filter models of attention
Brain chooses what to listen to, then filters out everything else; we shouldn’t have a conscious idea of what was left out
Later filter models of attention
“leaky filter model”, both attended and unattended messages are filtered through, but attended is way stronger, based on meaning
Capacity models of attention
Amount of information people can handle; limit
Load theory of attention
Difficulty of task; high load vs low load
Stroop test
red green but different lol; reading words has become highly ingrained that its hard to say the color
Automatic vs Controlled process
Automatic - Stroop word reading
Controlled - Active perception, saying color, working past automatic
Parallel vs serial processing
Serial: one word at a time
Parallel: Taking in a scene all at once
Visual source
Feature integration theory
Single Features automatically observed
Conjunction
Feature search
Single features easier to spot
Conjunction Search
Searching for features will make up one object, serially
Illusory conjunction
Errors can occur with needing so much attention
The binding problem
Combination of background, emotional stimuli, and objects
Satisfaction of Search
Finding one item decreased chance of finding another
Target frequency
Less frequently things show up, less likely to spot
Vigilance
Searching attention drops after some time, “definitely within 15 min, more complex tasks after 5 min”
Inattention Blindness
Difficulty detecting change when paying attention to something
Change blindness
Difficulty detecting change in environment
Perceptual Load
Difficulty of a task
Preattentive stage
Automatic, unconscious, and effortless stage of attention
Visual Scanning
Movement of the eyes from one location to the other
Attentional Blink
testing ability to detect stimuli presented in rapid succession
Attention Capture
Attention being captured
Bottleneck model
Humans are only able to have a limited amount of attentional resources
Sensory store
All sensory inputs, 500ms to 2 seconds
Short term memory
Immediate store of memory, very short, attention, 20-30 seconds
Long term memory
Encoded memory, able to be retrieved, infinite space
Iconic memory
Sight memory
Echoic memory
Auditory
Rehearsal
Repeating a stimulus
Encoding
Storing into long term memory
Retrieval
Process of remembering thigs from long term
Storage modality
sensory, short term, long term]
7 +/- 2
number of things that can actively be remembered in short term memory
Serial Position Curve
Curve showing the outcome of primacy and recency effects
Primacy Effect
Remembering things you learned at the beginning
Recency Effect
Remembering things you learned most recently
Anterograde Amnesia
Inability to encode new memories