So sánh phương pháp

	Hệ số xác định hiệu chỉnh (R²_adj)	Hệ số xác định (R²)
Lĩnh vực	Đánh giá mô hình	Đánh giá mô hình
Họ	MCDM	MCDM
Năm ra đời	1961	1896
Người khởi xướng	Henri Theil	Karl Pearson
Loại	Penalized goodness-of-fit metric	Goodness-of-fit metric
Công trình gốc	Theil, H. (1961). Economic Forecasts and Policy. Amsterdam: North-Holland Publishing Company.	Pearson, K. (1896). Mathematical contributions to the theory of evolution. Philosophical Transactions of the Royal Society A, 187, 253-318.
Tên gọi khác	Adjusted R², R²_adj	R², coefficient of determination, r2 score
Liên quan	5	5
Tóm tắt	Adjusted R² is a corrected version of the coefficient of determination that accounts for the number of predictors in a regression model. Introduced by Henri Theil in 1961, it addresses the fundamental limitation of standard R²: the tendency to increase whenever any predictor is added, regardless of whether that predictor contributes meaningfully to explaining the target variable.	The coefficient of determination, denoted R², measures the proportion of variance in the dependent variable explained by the independent variables in a regression model. Introduced by Karl Pearson in the late 19th century, R² is one of the most widely used metrics for assessing how well a model fits observed data.