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10_Dynamics_Complexity_all_in_one_Presentation

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Click to edit Master subtitle style Introduction to cognitive science Psych 102/COGST 101/LING 170/PHIL 191/ COMS 101
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Embodied Cognition Dynamic Systems Emergent Complexity Evolutionary Adaptation Dynamics & Complexity
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Why we are more than brains in vats Embodied Cognition
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Embodiment of Cognition How is cognition driven by the bodies we inhabit? l Actions we are currently performing (or plan to perform) constrain our perception Recall the dancing bear l Eye movements during mental imagery We look as directed by the story l Eye-movements during recall We look where things were not where they are l Association between motor response and sensory input Interference makes the task harder
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Embodiment of Cognition The entire body is involved in cognition l Not just the brain l Even some stuff external to the body is involved in cognition
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Interacting Analog Systems Dynamic Systems
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Dynamic Systems What is a dynamic system? l Complex interactions of lots of variables Typically via direct, analog methods l Changes over time Rate of change changes over time Points of stability and points of chaos in the system l Nonlinear Cannot describe the pattern of data with traditional linear mathematics
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Dynamic Systems The watt steam engine The piston drives the flywheel The flywheel drives the load The speed of the flywheel is dependent on many factors Steam pressure Size of the load Lubrication Etc Need a constant speed at the flywheel to do work properly
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Dynamic Systems A computational approach l Attach a sensor to the flywheel Measures the speed (RPM) of the flywheel l Attach a sensor to the steam reservoir Measures steam pressure l Attach an actuator to the steam reservoir Increases or decreases pressure in the piston l Create a CPU to handle all this Compares RPM at flywheel to desired RPM Compares pressure in reservoir to safe values Increases or decreases pressure as necessary
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Dynamic Systems Digital system Symbolic system Brain + body system
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Dynamic Systems An alternative approach l And the one James Watt invented since he didn’t have a CPU in the 1800s
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Dynamic Systems The speed of the weights is directly controlled by the flywheel itself l As the flywheel speeds up, the weights push out l As the flywheel slows down, the weights push in The movement of the weights directly controls the steam valve l As the weights push in, the valve opens l As the weights push out, the valve closes
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Dynamic Systems
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