The present work presents two exploratory studies about the construction and validation of the Inductive Reasoning Developmental Stage (IRDT), a forty-eight items test based on the Model of Hierarchical Complexity. The first version of the test was administered to a convenience sample composed by 167 Brazilian people (50.3% men) aged between 6 to 58 years (M = 18.90, SD = 9.70). The Rasch Model...
