Services on Demand
Psicologia em Estudo
Print version ISSN 1413-7372
On-line version ISSN 1807-0329
VENDRAMINI, Claudette Maria Medeiros; SILVA, Marjorie Cristina da and CANALE, Michelle. Analysis of items of a statistical reasoning test. Psicol. estud. [online]. 2004, vol.9, n.3, pp.487-498. ISSN 1413-7372. http://dx.doi.org/10.1590/S1413-73722004000300017.
This study aimed at to analyze the 18 questions (of multiple choice type) of a test on basic concepts of Statistics for the classic and modern theories. The test was taken by 325 undergraduate students, randomly selected from the areas of Human, Exact and Health Sciences. The analysis indicated that the test has predominantly one dimension and that the items can be better fitting to the model of three parameters. The indexes of difficulty, discrimination and biserial correlation present acceptable values. It is suggested to include new items to the test in order to obtain reliability and validity to use it in the education context and to reveal the statistical reasoning of undergraduate students when dealing with statistical data representation.
Keywords : item response theory; classical psychometry; statistical education.