José Pina

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This paper describes the changes implemented in Priberam's question answering (QA) system since our last QA@CLEF participation, followed by the discussion of the results obtained in Portuguese and Spanish monolingual runs at the main task of QA@CLEF 2008. This time, the main goal of Priberam's participation, following the results of last year's evaluation,(More)
In this paper, the distributional properties and power rates of the Lz, Eci2z, and Eci4z statistics when they are used as item fit statistics were explored. The results were compared to t-transformation of Outfit and Infit mean square. Four sample sizes were selected: 100, 250, 500, and 1000 examinees. The abilities were uniform and normal with mean 0 and(More)
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