Comparison of performance on multiple-choice questions and open-ended questions in an introductory astronomy laboratory

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Michelle M. Wooten ; Adrienne M. Cool ; Edward E. Prather ; Kimberly D. Tanner (2014)
  • Publisher: American Physical Society
  • Journal: Physical Review Special Topics. Physics Education Research (issn: 1554-9178)
  • Related identifiers: doi: 10.1103/PhysRevSTPER.10.020103
  • Subject: Special aspects of education | LC8-6691
    acm: ComputingMilieux_COMPUTERSANDEDUCATION

When considering the variety of questions that can be used to measure students’ learning, instructors may choose to use multiple-choice questions, which are easier to score than responses to open-ended questions. However, by design, analyses of multiple-choice responses cannot describe all of students’ understanding. One method that can be used to learn more about students’ learning is the analysis of the open-ended responses students’ provide when explaining their multiple-choice response. In this study, we examined the extent to which introductory astronomy students’ performance on multiple-choice questions was comparable to their ability to provide evidence when asked to respond to an open-ended question. We quantified students’ open-ended responses by developing rubrics that allowed us to score the amount of relevant evidence students’ provided. A minimum rubric score was determined for each question based on two astronomy educators perception of the minimum amount of evidence needed to substantiate a scientifically accurate multiple-choice response. The percentage of students meeting both criteria of (1) attaining the minimum rubric score and (2) selecting the correct multiple-choice response was examined at three different phases of instruction: directly before lab instruction, directly after lab instruction, and at the end of the semester. Results suggested that a greater proportion of students were able to choose the correct multiple-choice response than were able to provide responses that attained the minimum rubric score at both the post-lab and post-instruction phases.
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