using diagnostic tests to evaluate student understanding presented by glenn wagner
TRANSCRIPT
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Using Diagnostic Tests to Evaluate Student Understanding
Presented by Glenn Wagner
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Evaluating Student Understanding
Why Bother…• What do your students know about
fundamental physics concepts?• Is your instruction developing
understanding of fundamental physics concepts?
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Force Concept Inventory (FCI)
• Developed in 1992 (Hestenes, Halloun, Swackhammer)
• Designed to test understanding for conceptual understanding in Newtonian physics
• Tested extensively for validity and reliability• Includes ‘distractors’ to elicit pre-Newtonian
thinking (e.g. heavier objects fall faster than lighter objects)
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How to Administer a Diagnostic Test
• Begin with a pre-test before instruction (this gives a base-line of their initial understanding)
• After instruction, give the same test again, post-test (how much learning did they gain in understanding?)
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We can extract two quantities…
1) Raw post scores (simply the final mark)
2) % gain in understanding
% gain = (% posttest score) – (% pretest score) (100 – % pretest score)
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Let’s Play!!!
Let’s complete the Force Concept Inventory
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Interpreting the Results
Hestenes and Halloun say….• 60% is the Newtonian ‘threshold’ where
students have barely begun using Newtonian concepts coherently
• 85% is the Newtonian Mastery threshold where students at this score or above are ‘confirmed Newtonian thinkers’
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Interpreting the % gain
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Mechanics Baseline Test (MBT)
• Designed to test for the most basic concepts in mechanics
• Use as a post-test only• Scores are expected to be lower than FCI since
it is more difficult• FCI and MBT fit well together and give a broad
snapshot of student understanding in Newtonian mechanics
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Diagnostic Test for Understanding Graphs in Kinematics (TUGK)
• This diagnostic focusses on 3 fundamental areas:
Slope of d-t graph gives velocitySlope of v-t graph gives accelerationArea under v-t graph gives displacement
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Try This….
• Apply FCI as a post test this June to your students (SPH 4U)
• Apply FCI as a pre-test this September and post-test in January