Doubler R Grammar
Double R Model

Double R Process

Toward a Functional Model of Human Language Processing (2010, 6 pages) : This paper describes a computational cognitive model of human language processing under development in the ACT-R cognitive architecture. The paper begins with the context for the research, followed by a discussion of the primary theoretical and modeling commitments. The main theoretical commitment is to develop a language model which is at once functional and cognitively plausible. The paper continues with a description of the word recognition subcomponent of the language model which uses a perceptual span and ACT-R?s spreading activation mechanism to activate and select the lexical unit that most closely matches the perceptual input. Next we present a description of the linguistic structure building component of the model which combines parallel, probabilistic processing with serial, pseudo-deterministic processing, including a non-monotonic context accommodation mechanism. A description of the mapping of linguistic representations into a situation model, follows. The paper concludes with a summary and conclusions.
Keywords: human language processing (HLP); functional,cognitively plausible, pseudo-deterministic, context accommodation
Context Accommodation in Human Language Processing (2010, 12 pages) : This paper describes a model of human language processing (HLP) which is incremental and interactive, in concert with prevailing psycholinguistic evidence. To achieve this, the model combines an incremental, serial, pseudo-deterministic processing mechanism, which relies on a non-monotonic mechanism of context ac-commodation, with an interactive mechanism that uses all available information in parallel to select the best choice at each choice point.
Keywords: human language processing (HLP); functional,cognitively plausible, pseudo-deterministic, context accommodation
Toward a Large-Scale Model of Language Comprehension in ACT-R 6 (2007, 6 pages) : We are developing a large-scale model of language comprehension in ACT-R 6 for use in the creation of a synthetic teammate that can function as the Air Vehicle Operator (AVO) in a three-person simulation of an Unmanned Aerial Vehicle (UAV) team performing a reconnaissance mission. The use of ACT-R 6 to implement the core components of this system reflects the strong cognitive modeling orientation of this research. However, the focus is on creating cognitively plausible linguistic and associated non-linguistic representations, rather than modeling the fine-grained time course of language processing as is more typical of ACT-R models. In this regard, an empirical study aimed at discovering evidence of linguistic representations is discussed. Beside the focus on linguistic and non-linguistic representations, the large-scale nature of this effort distinguishes it from typical cognitive modeling research.
Construction-Driven Language Processing (2006, 6 pages) : the description of an approach to language processing during comprehension based on the activation, selection and integration of constructions corresponding to the linguistic input
Can NLP Systems be a Cognitive Black Box? (2006, 6 pages) : An examination of whether or not NLP systems can be developed without considering how humans process language
Integrating ACT-R and CYC in a large-scale model of language comprehension for use in intelligent agents : a description of an attempt to integrate CYC assertions into Double R Model
Double R Theory Summary Paper (2003, 70 pages): an extended discussion of Double R Theory which covers Double R Grammar, Double R Process, and Double R Model
DISTRIBUTION A: Approved for public release; distribution unlimited.