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Can mixed assessment methods make biology classes more equitable?

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Mixed assessment methods in STEM courses benefit women by reducing the impact of high-stakes exams. This approach closes performance gaps and challenges the notion of student deficits.

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Area of Science:

  • STEM Education Research
  • Gender Studies in Science
  • Educational Psychology

Background:

  • Attrition of women in Science, Technology, Engineering, and Math (STEM) fields is a persistent issue.
  • Lower performance of women in introductory STEM courses is often attributed to deficits in incoming preparation.
  • Traditional assessment methods, heavily reliant on high-stakes exams, may disadvantage certain student groups.

Purpose of the Study:

  • To investigate the impact of mixed assessment methods on gender-based performance in introductory biology courses.
  • To determine if de-emphasizing high-stakes exams benefits female students and closes overall performance gaps.
  • To challenge the 'student deficit model' and propose a 'course deficit model' for understanding performance disparities.

Main Methods:

  • Analysis of gender-based performance trends in nine large introductory biology courses (N > 1000 students) using mixed assessment methods.
  • Comparison of exam performance versus performance on other assessment types (quizzes, assignments, participation).
  • Case study analysis of three courses that altered their grading schemes to de-emphasize or emphasize exams.

Main Results:

  • Females underperformed on exams compared to males, but this gap disappeared when considering other assessment methods.
  • Courses that shifted away from an exam emphasis showed a benefit for female students, closing overall performance gaps.
  • Reducing the weight of exams in overall course grades decreased the gender performance gap on exams themselves.

Conclusions:

  • Mixed assessment methods, which minimize the impact of high-stakes exams, can effectively reduce gender-based performance gaps in STEM.
  • The 'course deficit model' offers a more accurate explanation for performance disparities, highlighting the classroom's microclimate.
  • Advocacy for mixed assessment strategies and active learning techniques to create more inclusive STEM learning environments.