One essay by this thinker differentiates between "similarity disorders" and "contiguity disorders" to support his view of the "vertical" and "horizontal" dimensions of language, which are represented respectively by the metaphoric and metonymic poles. That paper is "Two Aspects of Language and Two Types of Aphasic Disturbances." One of his best-known theories expands upon the Organon model of Karl BÃ¼hler, adding categories such as "phatic" and "metalingual" to arrive at a system of six linguistic functions, each corresponding to a different factor of the communication process. With Gunnar Fant and Morris Halle, he co-wrote Preliminaries to Speech Analysis, developing the distinctive feature theory of phonology. FTP, name this Russian linguist who, along with Nikolai Trubetskoy, was a member of the Prague circle. 
One essay by this thinker differentiates between "similarity disorders" and "contiguity disorders" to support his view of the "vertical" and "horizontal" dimensions of language, which are represented respectively by the metaphoric and metonymic poles. That paper is "Two Aspects of Language and Two Types of Aphasic Disturbances." One of his best-known theories expands upon the Organon model of Karl BÃ¼hler, adding categories such as "phatic" and "metalingual" to arrive at a system of six linguistic functions, each corresponding to a different factor of the communication process. With Gunnar Fant and Morris Halle, he co-wrote Preliminaries to Speech Analysis, developing the distinctive feature theory of phonology. FTP, name this Russian linguist who, along with Nikolai Trubetskoy, was a member of the Prague circle. 
One essay by this thinker differentiates between "similarity disorders" and "contiguity disorders" to support his view of the "vertical" and "horizontal" dimensions of language, which are represented respectively by the metaphoric and metonymic poles.
Roman Jakobson