Yöntem Karşılaştırma

	Type-Token Ratio	Sözcüksel Çeşitlilik
Alan	Dilbilim	Metin madenciliği
Aile	Process / pipeline	Process / pipeline
Köken yılı	1944	—
Köken	Wendell Johnson	—
Tür	Descriptive index of lexical diversity	Text quantification / lexical richness measurement
Seminal kaynak	Johnson, W. (1944). Studies in language behavior: A program of research. Psychological Monographs, 56(2), 1–15.	McCarthy, P. M. & Jarvis, S. (2010). MTLD, vocd-D, and HD-D: A validation study of sophisticated approaches to lexical diversity assessment. Behavior Research Methods, 42(2), 381-392.
Diğer adlar	TTR, Type/Token Ratio, Lexical Variation Ratio	lexical richness, vocabulary richness, Sözcüksel Çeşitlilik Analizi
İlişkili	4	3
Özet	The type-token ratio (TTR) is the oldest and most widely used measure of lexical diversity: the number of distinct word types in a text divided by the total number of word tokens. A text in which few words repeat yields a TTR near 1, while a text that recycles a small vocabulary yields a TTR near 0. Despite its intuitive appeal and trivial computation, the raw ratio is severely confounded by text length, which has motivated a long line of length-correcting transformations and, ultimately, the more robust indices that have largely superseded it for serious comparison.	Lexical diversity analysis quantifies how varied the vocabulary of a text is — how rich an author's word choice is — using measures such as the type-token ratio (TTR), MTLD, vocd-D, and Yule's K. The MTLD and vocd-D measures were validated by McCarthy and Jarvis (2010), building on earlier work by Tweedie and Baayen (1998) on the stability of lexical-richness measures.