The present study is an attemptive one on non-natural added information， i.e. overinformativeness in the interactional exchange， endeavoring to explain this linguistic phenomenon on the strength of cultural pragmatic adaptation theory， proposed by Jef. Verschueren and from the perspective of cultural study itself. Some questions concerning this topic have been discussed， including what manipulations and effects of the overinformativeness are demonstrated， how cultural pragmatic adaptation theory explains the overinformativeness， and how the overinformativeness adapt to three properties and four angles ofinvestigation within the scope of cultural pragmatic adaptation theory. The author regards Verschueren's theory of linguistic making-choices as a theoretical framework to explore how both language- internal and language-external choices explain the overinformativeness， and to analyze how the adaptation regarding perlocutionary acts and interactional strategies take place in the overinformativeness.
　　According to Verschueren， the study of pragmatics should be put one's hand from functional perspectives， that is， a general social， cultural and cognitive perspective on language use. Cultural pragmatic adaptation theory is originated and developed on the basis of his notion， a perspective on language. By virtue of present achievements in the field of linguistics， it is believed that cultural pragmatic adaptation theory is a comparatively mature and complete theory， as well as a solid theoretical basis of this book. The author dwells on the overinformativeness and its related studies and achievements. In addition， pragmatics-related aspects， such as traditional notions and Verschueren's functional perspective on pragmatics， are introduced in depth at the beginning of the study.

　　《欧盟治理文件中“信息过量”的文化研究（英文）》：
　　After having responding to the question what happens to people when using language， Verschueren made further investigations on why people can make linguistic choices in the process oflanguage use， and he catalogued three notions of language： variability， negotiability and adaptability， to uncover the complexity of pragmatic phenomena.
　　Variability， a quality of language， means that interlocutors have a range of possibilities when using language. The language interlocutors' choose is remarkably made some alterations along with communicative needs or structural functions， etc. As a result， the scope ofpossible chorces cannot be taken as being stable or fixed， instead， continuously changing. The notion of variability is distinct from the phenomenon of variation against the theoretical frame of sociolinguistics. Although sociolinguists state that speakers make constant use of many different possibilities without speaking in the same way all the time for a broad variety of purposes， they hold that variations in a language may be related to region， social status， and educational background and like. Variability， defined by Verschueren， takes place at both language-internal and language-external structures， which can make chosen language satisfy interlocutors' communicative psychology and need； moreover， it can make some alternatives or create new ones for the present needs of exchange.
　　Negotiability is the quality of language which is required to linguistic choices being made on the strength of extremely flexible principles and strategic operative mechanisms， instead of mechanically fixed rules or static theories. Language use or linguistic choice is achieved neither according to rigid rules nor at random. Rather， language user depends constantly on the context-motivated and strategic orientations. Saussure （2001） discussed that the first feature of human language is arbitrariness. It means that forms of linguistic signs have no natural relationship to their meaning， and arbitrariness oflanguage gives rise to its negotiability ofindeterminacy-featured choices-making. Negotiability is filled with implications of indeterminacy， since language addressers have the freedom to choose language resources， but it is rarely realized that their choices seemingly are subject to the loose constraints of conversational strategies. Additionally， language addressees have trouble in understanding， for example， the meaning addresser conveys covers properties of conversational implicature， which represent a weak form of communication. Whether producing language or interpreting language， indeterminacy can be permanently re-negotiable to realize fully appropriate purposes of communication by virtue of dynamics oflanguage and variability ofit. It follows that negotiability， being a quality oflanguage， serve as the guarantee of avoid communicative troubles or failures.
　　Adaptability， the third quality of language， can be described as a core of an approach to pragmatics， which enables interlocutors to make negotiable options from a widely variable set of possibilities so as to fulfill the satisfaction for communicative needs. It is necessary to indicate something special and precise on Verschueren's definition， Verschueren underlined the function of adaptability that approaches points of satisfaction for communicative needs. Hence， it is implied that satisfaction is only approached and may take place ranging from changing degrees， while it is incapable of excluding the possibilities of communication failure. When it comes to communicative needs， strictly speaking it doesn't necessarily followed that language use occurring for meeting needs has to be interactional， where the addresser's communicative needs coincide with those of the addressee， these related needs always come into being in context and thus are rather specific. Being the same as negotiability， adaptability is considered as a necessity to avert noncommunication or miscommunication.
　　These three notions should be regarded as an overall object of study for pragmatics， revealing the complexity and functionality of language. Therefore， they are indivisible with different ranks， that is to say， the notion of adaptability is allowed to use as the starting point in further pragmatic descriptions ranks higher on the premise of realization of variability and negotiability.
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