Mirian Agus|Maria Pietronilla Penna|Maribel Peró?Cebollero|Joan Guàrdia?Olmos
Assessing Probabilistic Reasoning in Verbal-Numerical and Graphical-Pictorial Formats: An Evaluation of the Psychometric Properties of an Instrument
University of Cagliari|University of Cagliari|Universitat de Barcelona|Universitat de Barcelona
backgroundresearch graphical facilitation probabilistic reasoning characterised effort expended identify valid assessment tools authors developed assessment instrument compare reasoning problems presented verbalnumerical graphicalpictorial formatsmaterial methodsa sample undergraduate psychology students n676 developed statistical skills solved problems requiring probabilistic reasoning attended universities spain n127 f717 italy n549 f729 italy 173 undergraduates solved problems time pressure remaining students solved problems without time limitsresultsclassical test theory ctt item response theory irt applied assess effect two formats evaluate criterion discriminant validityconclusionsthe instrument produced acceptable psychometric properties providing preliminary evidence validity