Exam 2 Flashcards
What is recognition?
Identifying a stimulus, object, input, etc. requires its perception and is shaped through experience
What are the levels of recognition?
- Description
- Labeling
What are the stages of visual perception?
- The distal stimulus is perceived in the real world and processed by the occipital lobe
- The distal stimulus becomes a proximal stimulus and takes two separate neural pathways of perception
- The dorsal stream in the parietal lobe processes the spacial orientation of the stimulus
- The ventral stream in the temporal lobe processes what the stimulus is
- The stimulus becomes a precept
What are the gessalt principles for visual stimuli
- Proximity
- Similarity
- Continuity
4.Common fate - Closure
What is categorical perception
Phenomenon by which the categories possessed by an observer influence the observers perception. Our experiences define the categories by which we perceive stimuli.
Explain the Poster and Keel pattern recognition experiment
Training phase: Present each exemplar/dot pattern at at time without showing prototype. Participants had to classify them into 4 categories
Testing phase: participants were presneted with previous distorted exemplars, new distorted exemplars and the unseen prototypes
- old exemplars: 85% accuracy
- new exemplars: 70% accuarcy
- prototypes: 82% accuracy
Revelas that participants had created or reconstructed the prototypes in their minds through normalization
Explain normalization and exemplar matching
Normalization: Averaging exemplars to create and average(prototype)
Ex: pronunciation of words
Exemplar matching: Recognizing a stimuli by comparing it to existing exemplars in the same category
Ex: Recognizing a voice
What are the cons to exemplar matching?
- Limited Memory capacity
- Nivel exemplars
- Determination of Recognition threshold
- Absolute/detection
- Difference
What is a prototype?
It is the most representative exemplar in a category or an average of all the exemplars in a category
