Related Experiment Video
Updated: Jul 15, 2026

Breakfast Habits among Schoolchildren in the City of Uruguaiana, Brazil
Published on: July 29, 2020
A comparative study of performance in the Conners' Continuous Performance Test between Brazilian and North American
Mônica Carolina Miranda1, Elaine Girão Sinnes, Sabine Pompéia
1Department of Psychobiology, Federal University of São Paulo, Brazil. mcarol@psicobio.epm.br
Objective:
The present study investigated the performance of Brazilian children in the Continuous Performance Test, CPT-II, and compared results to those of the norms obtained in the United States.
Method:
The U.S. norms were compared to those of a Brazilian sample composed of 6- to 11-year-olds separated into 4 age-groups (half boys) that represented the socioeconomic class distribution of São Paulo City. The children were prescreened for attention deficit disorders (ADHD).
Results:
Age and gender effects in the Brazilian sample were similar to those previously described. However, the Brazilian sample showed better performance in almost all measures in all age-groups compared to that of the United States.
Conclusion:
It is discussed that differences between samples probably reflect lack of ADHD screening of the U.S. children. More studies are necessary to determine if the CPT-II is a cross-cultural test with participants from different samples matched for age, gender, and socioeconomic status screened for ADHD.

