So sánh phương pháp

	Tái cấu trúc nội tại	Phương pháp so sánh	Thời biểu ngôn ngữ học
Lĩnh vực	Ngôn ngữ học	Ngôn ngữ học	Ngôn ngữ học
Họ	Process / pipeline	Process / pipeline	Process / pipeline
Năm ra đời	1891	1786	1950
Người khởi xướng	Henry Heffner Hock	Sir William Jones	Morris Swadesh
Loại	Empirical process pipeline	Empirical process pipeline	Empirical process pipeline
Công trình gốc	Hock, H. H. (1991). Principles of Historical Linguistics (2nd ed.). Berlin: Mouton de Gruyter.	Hock, H. H. (1991). Principles of Historical Linguistics (2nd ed.). Berlin: Mouton de Gruyter.	Swadesh, M. (1950). Salish internal relationships. International Journal of American Linguistics, 16(3), 157-167.
Tên gọi khác	Interlingual Reconstruction, Diachronic Morphology	Historical Comparative Linguistics, Genetic Linguistics	Lexicostatistics, Glottochronological Dating
Liên quan	3	4	2
Tóm tắt	Internal Reconstruction is a historical linguistic method that reconstructs earlier stages of a single language by identifying internal inconsistencies, morphological irregularities, and distributional patterns within the language itself. Unlike the Comparative Method, which relies on comparing related languages, Internal Reconstruction uses evidence from within one language—such as suppletive forms, analogy-induced irregularities, and phonological asymmetries—to infer its historical structure and sound changes. This method is particularly valuable when only one written form of a language survives or when related languages are unavailable.	The Comparative Method is a foundational technique in historical linguistics for reconstructing ancestral languages and establishing genetic relationships between related languages. Pioneered by Sir William Jones in 1786, it systematically compares phonological, morphological, and lexical features across languages to identify regular sound correspondences and trace their shared origins. This method underpins modern historical linguistics and has been essential for understanding language families worldwide.	Glottochronology, or lexicostatistics, is a quantitative method in historical linguistics that estimates the time of divergence between related languages based on the proportion of shared cognates in their basic vocabularies. Developed by Morris Swadesh in 1950, the method assumes that core vocabulary items change at a relatively constant rate over time, allowing linguists to calculate a 'time depth'—how long ago two languages shared a common ancestor. Though controversial due to its restrictive assumptions, glottochronology provides rough temporal estimates when archaeological or written records are unavailable.