Lecture 13 & McClelland Reading
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semantic tasks are | show 🗑
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semantic info is | show 🗑
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semantic task performance is thought to depend on a mediating process of categorization where there exists | show 🗑
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show | access to relevant category representations
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categorization based approaches lie | show 🗑
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the 3 constructs that are frequently invoked in categorization based theories to explain empirical data are | show 🗑
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show | directs the sharing of info across related concepts at different levels of abstraction
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show | info that is accessed directly & not by means of spreading activation in the processing hierarchy
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category prototypes are | show 🗑
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the 3 constructs used in categorization based theories offer | show 🗑
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show | such that exemplars of one category must also be members of another & these class inclusion constraints can be described by a taxonomic hierarchy
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show | the observation that category membership at each level entails a # of properties that are shared by the members of the more specific included categories
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show | permitted the activation of a category representation to spread to taxonomically superordinate concepts & this model provided a mechanism for property inheritance & generalization of new knowledge
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show | violate the predictions of the taxonomic hierarchy model
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show | pattern of deficits in cases of progressing fluent aphasia or semantic dementia
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show | the progressive deterioration of semantic knowledge while other cognitive faculties remain relatively spared
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show | info about specific categories at the bottom of the taxonomy
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studies by Cambridge group show that semantic dementia patients exhibit | show 🗑
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the structure apparent in impair performance of semantic tasks reveals | show 🗑
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show | the first to be activated during access & the first to be acquired in development
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Neil used children's responses to the judgement or propositions & their negations to construct predictability trees which | show 🗑
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concepts on predictability trees occupy the same node if | show 🗑
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show | influence of general category membership on the processing of more specific category info
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info stored with more general representations can determine | show 🗑
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illusory correlations are | show 🗑
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show | the frequency objects & properties co-occur across a particular set of events
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subjects persist in the belief that particular objects/properties have occurred together frequently even with | show 🗑
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show | categorize objects at general level of animate/inanimate & attributed typical properties to unfamiliar stimuli
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show | basic level of categorization
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show | identify objects at basic level
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Roach et al. demonstrated that at the basic level subjects | show 🗑
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show | the cognitive system exploits representations that correspond to into-rich bundles of co-occurring attributes in the environment
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show | special statistical properties
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Murphy & Lassaline describe basic categories as | show 🗑
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show | their exemplars have little in common
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show | they have few distinguishing characteristics
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show | share many properties with each other& few with contrasting categories & are considered to be particularly useful
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Rosch proposed that cognitive faculties develop to take advantage of the basic level structure by | show 🗑
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what constitutes the basic level reflects | show 🗑
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show | typical members but not atypical
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show | entry point into a taxonomic processing hierarchy
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show | only its basic category representation
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show | must be retrieved by means of spreading activation in the taxonomy
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privileged access theories introduce | show 🗑
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show | info stored at more general/specific levels of abstraction is only accessible through the prior activation of base-level concept representations
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show | reside at same level of taxonomic specificity for all exemplars & might be found at a more specific level of the hierarchy for atypical instances
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show | increasing expertise in a domain which suggests that such effects are in part constrained by experience
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show | subordinate level in their domain & novices prefer to name at basic-level
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experts in a given domain may derive somewhat different conceptions about how | show 🗑
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show | the details of the experience we have within the categories
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show | primacy over the most general level
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show | family resemblances
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show | occur in clusters
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show | forming summary representations of categories that correspond to clusters of correlated attributes in the environment
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show | graded (some objects are better examples of categories than others)
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show | verify than good/typical members
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show | a prototypical set of descriptors that are generally, but not necessarily, true of the category's exemplars
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time taken to classify a given instances is inversely proportional to | show 🗑
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show | natural categories are represented by summary descriptions that are abstracted through exposure to instances in the environment
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show | the category with the closest match under some measure of similarity
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in prototypes theory the time taken to perform assignment depends upon | show 🗑
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Mervis extended prototype theory to account for | show 🗑
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show | a small # of properties relative to adult category prototypes
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show | effect of typicality on reaction times in category & property-verification tasks
over-extension of familiar names to inappropriate but related objects in lexical acquisition & dementia & inappropriate restriction during early word learning
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show | how more general category membership can influence categorization processing at more specific levels
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hierarchically organized processing models will have difficulty explaining | show 🗑
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categorization-based theories face further challenges from | show 🗑
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basic tenet of theory-theory approach is that | show 🗑
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show | "nice theories" are
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the key function of the theory-theory approach is to | show 🗑
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in the TLC model a node inherits | show 🗑
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show | reverse distance effects
typicality effects
basic level effects
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show | not s strict hierarchy because concepts can be associated via a direct link & connections vary in length
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show | the strength of the relationship
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properties in the original TLC are given by | show 🗑
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show | spreading activation
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show | a person is faster to respond to a lexical decision task if it was preceded by a related word
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