label shift
[ˈleɪbəl ʃɪft]
nounpl: label shifts
mudança de rótulo
1. A linguistic phenomenon where a word changes its meaning or referent over time, often due to a shift in how it is used or classified by speakers
The label shift of the word 'gay' from meaning 'happy' to referring to sexual orientation is a well-documented example in English.
A mudança de rótulo da palavra 'gay' de significar 'alegre' para se referir à orientação sexual é um exemplo bem documentado em inglês.
2. In machine learning and data science, a problem where the distribution of labels or class assignments changes between training and deployment data
The model experienced label shift when the proportion of positive to negative examples changed dramatically in the production environment.
O modelo sofreu mudança de rótulo quando a proporção de exemplos positivos para negativos mudou drasticamente no ambiente de produção.
3. A change in classification or categorization of items, concepts, or entities
The label shift in product categorization required updating the entire inventory system.
A mudança de rótulo na categorização de produtos exigiu atualização de todo o sistema de inventário.
This term is primarily used in academic, linguistic, and data science communities in both Brazil and the USA. It has become increasingly important in machine learning discussions as practitioners grapple with real-world data distribution changes. The concept is relatively recent in popular usage but fundamental in computational linguistics and AI research.
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