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COGSCI 200 FINAL STUDY GUIDEComputationAll mentation is computationComputation is execution of an algorithmoMaps one set of symbols to anotheroFinitely specifiableoExecution itself doesn’t require intelligenceAlgorithms can be implemented in different physical abstracts3 levels of explanation in cognitive scienceoFunctional – what problem needs to be solvedoAlgorithmic – procedures to solve the problemoBehavioral/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 itselfoEx. 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 toeTuring Machine as a formalization of computationoComputing functionsUniversal computationoTuring machines?Computable vs. incomputable functionsoThe halting problemSearch as a method for achieving intelligenceoEx. Deep BlueoMore intelligent the faster you can solve a problem ChoiceExpected value = probability x valueValuation and choice“Common currency” in brain to subjectively value optionsSeparate neural codes for value of choices offered and chosen optionsoEx. Monkey study with juice and tea found neural firings for both offered choice and chosen choiceoOrbitofrontal cortex represent final common pathway for representation of subjective valueoCan measure firing rate of neurons to determine what is valued more in that person