COGSCI 200 FINAL STUDY GUIDE - COGSCI 200 FINAL STUDY GUIDE...

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COGSCI 200 FINAL STUDY GUIDE Computation All mentation is computation Computation is execution of an algorithm o Maps one set of symbols to another o Finitely specifiable o Execution itself doesn’t require intelligence Algorithms can be implemented in different physical abstracts 3 levels of explanation in cognitive science o Functional – what problem needs to be solved o Algorithmic – procedures to solve the problem o Behavioral/Physical – where the procedure needs to be implemented (ex. visual pathways, occipital cortex, etc.) Combinatoric search – the process of “search” is constructed from the search process itself o Ex. When building a search algorithm for a chess game, you are only going to be searching for different CHESS outcomes, and not other games like tic tac toe Turing Machine as a formalization of computation o Computing functions Universal computation o Turing machines? Computable vs. incomputable functions o The halting problem Search as a method for achieving intelligence o Ex. Deep Blue o More intelligent the faster you can solve a problem Choice Expected value = probability x value Valuation and choice “Common currency” in brain to subjectively value options Separate neural codes for value of choices offered and chosen options o Ex. Monkey study with juice and tea found neural firings for both offered choice and chosen choice o Orbitofrontal cortex represent final common pathway for representation of subjective value o Can measure firing rate of neurons to determine what is valued more in that person

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