Caterina Primi|Kinga Morsanyi|Maria Anna Donati|S. Galli|Francesca Chiesi
Measuring Probabilistic Reasoning: The Construction of a New Scale Applying Item Response Theory
University of Florence|Queen's University Belfast|University of Florence|University of Florence|University of Florence
abstract probabilistic reasoning skills important various contexts aim present study develop new instrument probabilistic reasoning scale prs accurately measure low levels probabilistic reasoning ability order identify people difficulties domain item response theory applied construct scale investigate differential item functioning ie whether items invariant across genders educational levels languages additionally tested validity scale investigating relationships prs several measures results revealed items low level difficulty nonetheless discriminative measures showed items discriminate individuals different trait levels test information function showed scale accurately assesses low levels probabilistic reasoning ability additionally investigating differential item functioning measurement equivalence scale item level confirmed gender educational status language ie italian english concerning validity results showed expected correlations numerical skills mathrelated attitudes statistics achievement iq reasoning skills risky choices italian british samples conclusion prs ideal instrument identifying individuals struggle basic probabilistic reasoning could targeted specific interventions copyright 2017 john wiley amp sons ltd