Duality of structure
Encyclopedia
Duality of structure is one of Anthony Giddens
Anthony Giddens
Anthony Giddens, Baron Giddens is a British sociologist who is known for his theory of structuration and his holistic view of modern societies. He is considered to be one of the most prominent modern contributors in the field of sociology, the author of at least 34 books, published in at least 29...

' coined phrases and main propositions in his explanation of structuration theory. The basis of the duality lies in the relationship the Agency
Human agency
In philosophy and sociology, agency is the capacity of an agent to act in a world. In philosophy, the agency is considered as belonging to that agent even if that agent represents a fictitious character, or some other non-existent entity...

 has with the Structure
Structure
Structure is a fundamental, tangible or intangible notion referring to the recognition, observation, nature, and permanence of patterns and relationships of entities. This notion may itself be an object, such as a built structure, or an attribute, such as the structure of society...

. In the duality, the Agency has much more influence on its lived environment than past structuralist theory had granted. The key to Giddens' explanation is his focus on the knowledgeability of the agent and the fact that the agency cannot exist or be analyzed separately from its structure. They can only exist as a duality. The structural properties which he calls modalities
Modalities (sociology)
Modalities are fundamental to understanding the concept behind Structuration. According to Anthony Giddens, modalities explain the properties of the Structure. The structure is said to have both structural and individual qualities. Giddens refers to these structural modalities as 'rules' and...

 help illustrate the dimensions of the duality.

The Structure has both rules
Norm (sociology)
Social norms are the accepted behaviors within a society or group. This sociological and social psychological term has been defined as "the rules that a group uses for appropriate and inappropriate values, beliefs, attitudes and behaviors. These rules may be explicit or implicit...

 and resources or constraints and enabling qualities. Language is often used to exemplify these modalities. The system of interaction includes in itself "rules" of the language such as syntax but also leaves room for interpretations or the creation of completely new words. The system of interaction is responsible for maintaining a certain standard of consistency in order for the language to make sense to both the speaker and the interpreter. At the same time, the completeness of the language can always be manipulated and changed through interaction by the agent.

The phrase is used in Chomsky
Chomsky
Chomsky Khomsk ") is a Belarus'-origin surname, and may refer to:* Aviva Chomsky , American historian* Carol Chomsky , American linguist and wife of Noam Chomsky* Elsie Chomsky, American educator...

 by John Lyons to illustrate the differences between human and animal communication. It is described there as "two levels of grammatical structure." The first being syntactic and the second being phonemes.
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