3 documents found, page 1 of 1
Evaluation of Enem (2009 and 2011)quality with psychometric techniques
Travitzki, RodrigoThis study is a meta evaluation of the Exame Nacional do Ensino Médio [National Secondary Education Examination] (Enem) of 2009 and 2011, applying psychometric techniques to 2.025.268 tests. Some techniques were illustrated by analysis of item content, showing their usefulness to educators. We compared indicators related to the tests (α coefficient and average inter-item correlation), but mainly related to the ...
A computerized adaptive test of Provinha Brasil - Leitura: results and perspect...
Travitzki, Rodrigo; Alavarse, Ocimar Munhoz; De Rizzo Meneghetti, Douglas; de Toledo Catalani, Érica MariaThis article describes a Computerized Adaptive Test (CAT) of Provinha Brasil – Leitura,1 based on Item Response Theory. We detail the operation and development of the algorithm. The CAT was administered by means of tablet computers to 1,983 students in the 1st and 2nd grades of primary education, in 15 schools of the Municipal Education System of São Paulo. Results confirm the quality of Provinha Brasil’s items...
Perspectivism as a basis for social network analysis: some results from Twitter
Travitzki, Rodrigo; Bastos, Marco Toledo; Raimundo, Rafael Luís GaldiniThis article presents a methodology for analysis of variables that influence the dissemination of information on the social network Twitter. We analyze data from 595,240 messages produced by 261,757 users and we found three local variables related to the degree of replication of messages (retweet): 1) the number of responses received (which explained an average of 21% of the retweets); 2) the number of follower...