Language Evolution and Computation Bibliography

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Takashi Hashimoto
2010
Artificial Life 16:271-287, 2010
Deacon has suggested that one of the key factors of language evolution is not characterized by an increase in genetic contribution, often known as the Baldwin effect, but rather by a decrease. This process effectively increases linguistic learning capability by organizing a novel ...MORE ⇓
Deacon has suggested that one of the key factors of language evolution is not characterized by an increase in genetic contribution, often known as the Baldwin effect, but rather by a decrease. This process effectively increases linguistic learning capability by organizing a novel synergy of multiple lower-order functions previously irrelevant to the process of language acquisition. Deacon posits that this transition is not caused by natural selection. Rather, it is due to the relaxation of natural selection. While there are some cases in which relaxation caused by some external factors indeed induces the transition, we do not know what kind of relaxation has worked in language evolution. In this article, a genetic-algorithm-based computer simulation is used to investigate how the niche-constructing aspect of linguistic behavior may trigger the degradation of genetic predisposition related to language learning. The results show that agents initially increase their genetic predisposition for language learning—the Baldwin effect. They create a highly uniform sociolinguistic environment—a linguistic niche construction. This means that later generations constantly receive very similar inputs from adult agents, and subsequently the selective pressure to retain the genetic predisposition is relaxed.
Proceedings of the 8th International Conference on the Evolution of Language, pages 184-191, 2010
Through a constructive study of grammaticalization as a potentially important process of language evolution, we have found two findings. One is that linguistic analogy, which applies linguistic rules extendedly, is a very critical for language acquisition and meaning change. The ...MORE ⇓
Through a constructive study of grammaticalization as a potentially important process of language evolution, we have found two findings. One is that linguistic analogy, which applies linguistic rules extendedly, is a very critical for language acquisition and meaning change. The other is that inferences based on the recognition of similarity and contingency among particular meanings can realize unidirectional meaning change, a remarkable characteristic of grammaticalization. We discuss the significance of these findings in the context of the origin and the evolution of language, especially the role of linguistic analogy in creativity. Based on the discussion, a hypothetical scenario of the origin and the evolution of language is proposed.
2009
Proceedings of the 3rd International Conference on Language and Automata Theory and Applications, pages 614-625, 2009
Creole is a new born language emerging in most cases where language contact takes place. Simulating behaviors that creole communities are formed in some environments, we could contribute to actual proof of some linguistic theories concerning language acquisition. Thus far, a ...MORE ⇓
Creole is a new born language emerging in most cases where language contact takes place. Simulating behaviors that creole communities are formed in some environments, we could contribute to actual proof of some linguistic theories concerning language acquisition. Thus far, a simulation study of the emergence of creoles has been reported in the mathematical framework. In this paper we introduce a spatial structure to the framework. We show that local creole communities are organized, and creolization may occur when language learners learn of ten from non-parental language speakers, in contrast to the non-spatial model. The quantitative analysis of the result tells us that emergence of local colonies at the early stage tends to induce the full creolization.
2005
Language Change in Modified Language Dynamics Equation by Memoryless LearnersPDF
Second International Symposium on the Emergence and Evolution of Linguistic Communication, 2005
Language change is considered as a transition of population among languages. The language dynamics equation represents such a transition of population. Our purpose in this paper is to develop a new formalism of language dynamics for a real situation of language contact. We assume ...MORE ⇓
Language change is considered as a transition of population among languages. The language dynamics equation represents such a transition of population. Our purpose in this paper is to develop a new formalism of language dynamics for a real situation of language contact. We assume a situation that memoryless learners are exposed to a number of languages. We show experimental results, in which contact with other language speakers during acquisition period deteriorates the learning accuracy and prevents the emergence of a dominant language. If we suppose a communicative language, when learners are frequently exposed to a variety of languages, the language earns relatively higher rate of population. We discuss the communicative language from the viewpoint of the language bioprogram hypothesis.
2003
Creole Viewed from Population DynamicsPDF
Proceedings of Language Evolution and Computation Workshop/Course at ESSLLI, pages 95-104, 2003
Creole is one of the main topics in various fields concerning the language origin and the language change, such as sociolinguistics, the developmental psychology of language, paleoanthropology and so on. Our purpose in this paper is to develop an evolutionary theory of language ...MORE ⇓
Creole is one of the main topics in various fields concerning the language origin and the language change, such as sociolinguistics, the developmental psychology of language, paleoanthropology and so on. Our purpose in this paper is to develop an evolutionary theory of language to study the emergence of creole. We discuss how the emergence of creole is dealt with in the perspective of population dynamics. The proposal of evolutionary equations is a modification of the language dynamics equations by Komarova et al. We show experimental results, in which we could observe the emergence of creole. Furthermore, we analyze the condition of creolization in terms of similarity among languages. We conclude that a creole becomes dominant when pre-existing languages are not similar to each other and rather similar to the newly appeared language (would-be-creole); however the new language must not be too similar, in which case pre-existing languages remain and coexist.
The Language Dynamics Equations of Population-Based Transition -- a Scenario for CreolizationPDF
Proceedings of the International Conference on Artificial Intelligence (IC-AI'03), 2003
Children will develop their parental languages correctly, since language learners come to obtain the one which they contact most in the community. At the same time, children would be affected by other languages, the influence of which is proportional to the population of those ...MORE ⇓
Children will develop their parental languages correctly, since language learners come to obtain the one which they contact most in the community. At the same time, children would be affected by other languages, the influence of which is proportional to the population of those languages. In this paper, we revise the foregoing evolutionary theory of language, that is differential equations of the population dynamics. We propose that the transition rate in languages is sensitive to the distribution of population of each generation. In addition, we introduce the exposure probability that is the measure of influence from other languages. We show experimental results, in which we could observe the emergence of creole. Furthermore, we analysed which language would be dominant, dependent on the initial distribution of population, together with the exposure probability.
2002
The constructive approach to the dynamical view of languagePDF
Simulating the Evolution of Language 14.0:307-324, 2002
2000
The Formation of Common Norms on the Assumption of `Fundamentally' Imperfect InformationPDF
Social Order in Multiagent Systems: Workshop on Norms and Institutions in Multi-Agent Systems (Held in conjunction with Autonomous Agents'2000), 2000
Abstract The role of social norms is to process' fundamentally'imperfect information. Information about future events, often needed in economic activity, is inevitably imperfect, since there's no way to check its correctness from our subjective viewpoint. The reason to ...
1999
ECAL99, pages 730-734, 1999
Categorization dynamics as the clustering of words in word relation is studied by a constructive approach which is suited to inquire evolutionary linguistics with dynamical view on language. Word meaning is represented by relationship among words. Tthe ...
1998
Development of Meaning Structure by Usage-based Word RelationshipsPDF
Proceedings of the Third International Symposium on Artificial Life and Robotics (AROB 3rd'98), pages 662--665, 1998
Abstract Development of meaning structure is studied from a usage-based viewpoint by a constructive approach. The meaning structure is represented by relationships between words. A word's relationship to other words, which represents meanings of the word, is ...
Multi-agent systems and Agent-Based Simulation 1534:124--139, 1998
Development of category structure in communication is studied by a constructive approach. Individuals having a word relation matrix as their internal structure communicate by uttering and accepting sentences. Words in sentences uttered are situated in relation with other ...
1997
Usage-based Structuralization of Relationships between WordsPDF
ECAL97, pages 483--492, 1997
Abstract The development of structure of relationships between words is studied with a constructive approach by means of arti cial agents with grammar systems. The agents try to recognize given sentences in terms of their own grammar. A word's relationship to other ...
1996
Biosystems 38(1):1-14, 1996
Evolution of symbolic language and grammar is studied in a network model. Language is expressed by words, i.e. strings of symbols, which are generated by agents with their own symbolic grammar system. Agents communicate with each other by deriving and accepting words via ...MORE ⇓
Evolution of symbolic language and grammar is studied in a network model. Language is expressed by words, i.e. strings of symbols, which are generated by agents with their own symbolic grammar system. Agents communicate with each other by deriving and accepting words via rewriting rule set. They are ranked according to their communicative effectiveness: an agent which can derive less frequent and less acceptable words and accept words in less computational time will have higher scores. They can evolve by mutational processes, which change rewriting rules in their symbolic grammars. Complexity and diversity of words increase in the course of time. The emergence of modules and loop structure enhances the evolution. On the other hand, ensemble structure lead to a net-grammar, restricting individual grammars and their evolution.
Evolution of Code and Communication in Dynamical Networks
Graduate School of Arts and Science, University of Tokyo, 1996
1995
Communication Network of Symbolic Grammar SystemsPDF
Proceedings of the International Conference on Dynamical Systems and Chaos, pages 595--598, 1995
Abstract-Interacting agents with symbolic grammar are proposed in order to study the evolution of computational ability of agents. The algorithmic evolution of the formal grammar system is characterized by Chomsky's hierarchy1. Agents with a higher grammar can ...
ECAL95, pages 812-823, 1995
Evolution of symbolic language and grammar is studied in a network model. Language is expressed by words, ie strings of symbols, which are generated by agents with their own symbolic grammar system. By deriving and accepting words, the agents communicate with ...