James Day|D. A. Bonn
Development of the Concise Data Processing Assessment
University of British Columbia|University of British Columbia
concise data processing assessment cdpa developed probe student abilities related nature measurement uncertainty handling data diagnostic ten question multiplechoice test used pretest posttest key component development process interviews students used uncover common modes student thinking validate item wording evaluate reliability discriminatory power diagnostic performed statistical tests focusing item analysis item difficulty index item discrimination index pointbiserial coefficient entire test test reliability fergusons delta scores cdpa range chance novices 80 experts indicating possesses good dynamic range overall results indicate cdpa reliable assessment tool measuring targeted abilities undergraduate physics students