Measuring emotions in the laboratory: validation of the methodology applied to the International Affective Picture System for the Brazilian population.

The International Affective Picture System (IAPS) catalog and the Self-Assessment Manikin pictorial scale (SAM) are important tools for evoking and measuring emotions in laboratory settings, respectively. A key feature of the standardized affective images contained in the IAPS catalog is the evocation of similar emotional responses among different groups of individuals and cultures, allowing the comparison of the findings from different laboratories around the world.