Two sets of mathematical reasoning and two sets of verbal comprehension items were cast into each of three formats--constructed response, standard multiple-choice, and Coombs multiple-choice--in order to assess whether tests with identical content but different formats measure the same attribute. (Author/CTM)

Analysis of response strategies employed by 261 undergraduate chemistry students when answering multiple-choice and stem-equivalent constructed-response questions revealed no significant differences in types of solution strategies or types of errors across test format. However, analysis of student oral reports revealed a higher frequency of…