PSYB57H3 Lecture Notes - Lecture 9: Ballet Bc, Intraparietal Sulcus, Premotor Cortex
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PSYB57 – Week 9
Visual Knowledge and Motor Cognition
- MIT 2003: Kosslyn Meets the Dalai Lama to discuss Visual Imagery
Kosslyn: “What shape are a cat’s ears?”
DL: “What kind of cat?”
Kosslyn (flustered): “A house cat…”
DL (taking Kosslyn’s hand): I see a furry head and it’s making me feel peaceful.”
Kosslyn: “How many windows are in your bedroom?”
People often think of mental images as pictures. They’re not. It is much more
difficult, even impossible, to "reverse" images like the duck/rabbit in your
head. During imagery, people don't realize there's an alternative way to see
the head. Introspection can be misleading!
The Dalai Lama is capable of conjuring up superb mental images of things he
cares about. For example, he keeps
accurate images of more than 700 gods in
his memory, where each may have three
heads and six arms, each holding a
Kosslyn: "Our exchange taught me that
Buddhist monks don't necessarily store
the same things as we do … It's a cross-
cultural difference I didn't expect."
Can you hold images in mind for Extended
Periods of Time?
- Buddhists monks claim that, through
training, they can hold vivid 3D images of
complex objects in their minds for 20 mins.
- North American undergrads find it difficult
to hold onto even a simple image for more
than 10 seconds.
- Imagery and Introspection (late 1800’s)
- Dual Coding Theory (Paivio, 1963)
- Roger Shepard and colleagues’ experiments on mental rotation.
Shepard & Meltzer (1971): 2 shapes, 1 rotated
Cooper & Shepard (1973): 1 rotated letter
- Mental Rotation - absolute angle of rotation
- Motor Cognition and Mental Stimulation
1. What is the nature of motor cognition?
2. What is a mental simulation of action?
3. Why and how do we reproduce the actions of others?
4. What is the role of motor cognition in perception?
- Perception-Action Cycle and Intentions
What is the mediating link b/w perception and action?