biostudies-literatureLozano OMFundación Progreso y Ssalude0194390https://www.ebi.ac.uk/biostudies/studies/S-EPMC5862457biostudies-literatureUnknown13(3)The UPPS Impulsive Behaviour Scale (with five dimensions of impulsive behaviour) is being widely used. One of the handicaps of this instrument is its relatively long administration time. This has led to the development of a short version: SUPPS-P. There are no studies comparing the relationship between the SUPPS-P scores and the original UPPS-P scores. The objectives of this study, therefore, were to analyse the psychometric properties, concordance of person measures, and efficiency of the SUPPS-P compared to those on UPPS-P, applying an Item Response Theory Model. The UPPS-P and SUPPS-P were administered to 455 undergraduate students. Confirmatory factorial analysis replicated structures reported in previous studies: the five correlated factors structure and the model with two second-ordePloS oneConcordance between the original and short version of the Impulsive Behaviour Scale UPPS-P using an IRT model.PMC5862457PI-0287-2014Lozano OMPilatti AFernandez-Calderon FRojas AJDiaz-Batanero CfalseConcordance between the original and short version of the Impulsive Behaviour Scale UPPS-P using an IRT model.The UPPS Impulsive Behaviour Scale (with five dimensions of impulsive behaviour) is being widely used. One of the handicaps of this instrument is its relatively long administration time. This has led to the development of a short version: SUPPS-P. There are no studies comparing the relationship between the SUPPS-P scores and the original UPPS-P scores. The objectives of this study, therefore, were to analyse the psychometric properties, concordance of person measures, and efficiency of the SUPPS-P compared to those on UPPS-P, applying an Item Response Theory Model. The UPPS-P and SUPPS-P were administered to 455 undergraduate students. Confirmatory factorial analysis replicated structures reported in previous studies: the five correlated factors structure and the model with two second-orde2018-01-01T00:00:00Z20182025-04-19T15:21:21.194Z2019-03-26T23:20:31ZS-EPMC58624572956190210.1371/journal.pone.0194390