Fig. 1From: Student test-taking effort in low-stakes assessments: evidence from the English version of the PISA 2015 science testRT (trimmed at 99%) distribution of item S131Q02 for the students who were administered the item in the 4th cluster position. a: Histogram of RT distribution (1 s intervals); the red vertical line corresponds to the threshold estimated by means of the FMM model. b: Densities estimated in the 2-class FMM modelBack to article page