Rossi-Casé, Lilia, Neer, Rosa, Lopetegui, Susana, Doná, Stella, Biganzoli, Bruno, and Garzaniti, Ramiro
The current paper presents the results of the construction of valid and updated norms for Raven’s Standard Progressive Matrices, in the city of La Plata, Argentina, and compares them with norms obtained in the years 1964 and 2000 in order to observe score trends. For this purpose a sample of 1049 subjects of both sexes, 13- 18 years old, high school students were selected. The test was administered collectively, without time limit. Data was split into three age groups and results were compared with norms from 1964 and 2000. It was also noticed that as age increases, subjects performance tend to improve. The scores variability is similar in all age groups. A slight decrease of the direct scores needed to reach an average performance was observed, when compared to those from 2000, which were the norms where the Flynn effect was first noted after 1964 and show a plateau effect in direct scores. It was also noticed that as age increases, subjects performance tend to improve. The scores variability is similar in all age groups. Also differences in the order of difficulty between test series were observed. All these results confirm the need for updating of the scales and the characteristics of the test material for the purposes of an accurate assessment. [ABSTRACT FROM AUTHOR]