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Englishy using Celp-Bras assessment scales, a construct of verbal proficiency in Portuguese for foreign-language speakers is operationalized and measured. The oral Celpe-Bras‘s score model is organized in seven items distributed in two scales through which the assessors - the interviewer and the observer – rate six each of the following items: comprehension, interactional competence, fluency, lexical adequacy, grammatical adequacy, and pronunciation. In order to analyze the dimensions of the scales, evidences to discuss the oral scale’s dimensionality, I perform the exploratory factorial analysis of a set of scores obtained by 1,000 participants who sat for the exam in its first edition in 2016. R² was 0.9617 and the Tucker Lewis Index (TLI) was 0.896. Only one factor explained the variables because the loading values ranged from 0.65 to 0.94. The measure was found unidimensional. According to the communality values, only comprehension was slightly below 0.5, indicating the need for further investigation. The weight values of each item were, in decreasing order:interviewer’s score 0.36,lexical adequacy 0.19, fluency 0.18,grammatical adequacy 0.13, interactional competence 0.09, pronunciation 0.06, and comprehension 0.04. Based on factorial analyses, I discuss a proposal for the composition of the individual scores in the oral test well as the implications of changing the weight of the items in the new proposal to rank participants on a per certification range basis. portuguesPor meio das escalas de avaliacao do Celpe-Bras, um construto de proficiencia oral em lingua portuguesa para falantes de outras linguas e operacionalizado e mensurado. Na prova oral, sete itens compoem duas escalas por meio das quais o avaliador-interlocutor e o avaliador-observador atribuem uma nota para cada um dos seis itens, a saber: compreensao, competencia interacional, fluencia, adequacao lexical, adequacao gramatical e pronuncia. Com objetivo de analisar a dimensionalidade das escalas, apresento a analise fatorial exploratoria do conjunto de notas de 1.000 participantes que se submeteram ao exame na primeira edicao de 2016. O coeficiente de determinacao R² foi de 0.9617 e o indice Tucker-Lewis (TLI) foi de 0.896. Os valores de carga fatorial dos itens da escala variaram de 0.65 a 0.94, sugerindo que os itens possam estar explicando o mesmo fator. O resultado da analise aponta que a nota da prova e uma medida unidimensional. A partir dos valores de comunalidade, apenas o item compreensao ficou ligeiramente abaixo 0.5, apontando a necessidade de investigacao do item. Os valores de peso para cada um dos itens sao, do maior para o menor; para nota do entrevistador, 0.36; adequacao lexical, 0.19; fluencia, 0.18; adequacao gramatical, 0.13; competencia interacional, 0.09; pronuncia, 0.06; compreensao, 0.04. Por meio da analise fatorial, apresento uma proposta de composicao da nota da prova oral e discuto as implicacoes da mudanca de peso dos itens na nova proposta para a classificacao dos participantes por faixas de certificacao.Palavras-chave

Um estudo sobre a dimensionalidade das escalas de avaliação da proficiência oral do Certificado de Proficiência em Língua Portuguesa para Estrangeiros