The document summarizes research using the Force Concept Inventory (FCI) to assess conceptual understanding of mechanics in mature learners at a foundation level. Key findings include:
- Students showed significant gains in conceptual understanding from pre- to post-testing with the FCI after interactive mechanics instruction. However, understanding remained below levels expected at university entry.
- The most misunderstood concepts pre-instruction were Newton's third law and inertia in rolling situations. Smaller than average gains were seen for questions involving these topics.
- Results were consistent with other studies, suggesting the FCI reliably captures typical misconceptions. However, some question its ability to comprehensively assess conceptual grasp of mechanics.
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2. To Cover
•
Introduction
•
•
The Force Concept Inventory Test
•
•
•
•
•
•
Sample Questions
Previous Uses & Outcomes
This project
•
•
Conceptual Learning vs Algebraic Skill
The Students
The Deployment
The Results
Discussion – Is the Test Robust?
Conclusions & Future Work
3. Introduction
•
Solving problems in physics requires two key skills:
•
•
•
•
Mathematical ability
Conceptual understanding
Mathematical ability is easier to test and many students
can get by without addressing conceptual understanding.
Mechanics is perhaps the most conceptually
misunderstood part of physics and yet more traditional
undergraduate class time is devoted to it than anything
else.
4. Ausubel’s Dictum: “Ascertain what the
student knows and teach accordingly”
“Ascertain what the student
misunderstands and teach
accordingly”
7. Conceptual Understanding
Two metal balls are the same size but one weighs twice as
much as the other. The balls are dropped from the roof of a
single story building at the same instant of time. The time it
takes the balls to reach the ground below will be:
(A) about half as long for the heavier ball as for the lighter
one.
(B) about half as long for the lighter ball as for the heavier
one.
(C) about the same for both balls.
9. Conceptual Understanding
The two metal balls of the previous problem roll off a
horizontal table with the same speed. In this situation:
(A) the heavier ball hits the floor considerably closer to the
base of the table than the lighter ball.
(B) the lighter ball hits the floor considerably closer to the
base of the table than the heavier ball.
(C) both balls hit the floor at approximately the same
horizontal distance from the base of the table.
10. Conceptual Understanding
200g
100g
The two metal balls of the previous problem roll off a
horizontal table with the same speed. In this situation:
(A) the heavier ball hits the floor considerably closer to the
base of the table than the lighter ball.
11. Conceptual Understanding
100g
200g
The two metal balls of the previous problem roll off a
horizontal table with the same speed. In this situation:
(B) the lighter ball hits the floor considerably closer to the
base of the table than the heavier ball.
12. Conceptual Understanding
200g
100g
The two metal balls of the previous problem roll off a
horizontal table with the same speed. In this situation:
(C) both balls hit the floor at approximately the same
horizontal distance from the base of the table.
14. Why is physics so difficult
•
•
•
•
Stock answer – Few have the talent for it!
Science education research has a different answer, from
thorough investigation of: personal beliefs about how the
world works uninformed by science
Learning physics involves transforming this belief – its a
pretty rough road.
First we need to know what the most common
misconceptions are.
15. Need a diagnostic test
•
•
•
•
Standardised, robust tests
Objectively marked (nearly always MCQ)
Target key learning outcomes
Use pre- and post-instruction
17. Validity and reliability
•
Tests should be valid
•
•
They actually test what you want them to
Tests should be reliable
•
They give reproducible results
Taken from Bates & Galloway 2010
19. Force Concept Inventory
•
The Force Concept Inventory (Hestenes et al. 1995) is
the most frequently used diagnostic test for assessing
conceptual understanding in physics:
•
•
•
•
•
Tested on > 50,000 students globally
Reliability checked
Use in UK has started (Edinburgh, Hull, Manchester)
It‟s been used to transform the way physics is taught
in the US and to open up a debate on conceptual
understanding in FE and HE.
Its aim is to assess student understanding of the
concept of Newtonian Force.
20. Measuring change in conceptual
understanding
Normalised gain
g
post pre
100% pre
23. Method
The study
•
The course – Maths Application Combined
•
The student cohort
2011-2012: 35 students (60% are mature home
students)
2012-2013: 25 students (60% are mature home
students)
24. Method
The study
•
The teaching - Interactive Engagement
Teaching is “designed at least in part to promote conceptual understanding
through interactive engagement of students in heads-on (always) and
hands-on (usually) activities which yield immediate feedback through
discussion with peers and/or instructors” (Hake, 1997)
25. Method
The teaching
•
Starting by students investigations using videos and on line
simulation
http://phet.colorado.edu/sims/projectile-motion/projectilemotion_en.html
• Demonstration, discussion and problem solving
26. Method
The teaching
•
Check the learning
According to Newton’s third law, if you push gently on something, it will push
a. gently on you.
b.
c.
d.
e.
gently on something else.
on something only under the right conditions.
on you only if you aren’t moving.
“the button” just like the Sugababes.
You are driving around a curve on a narrow one-way street at 25 mph when
you notice a car identical to yours coming straight toward you at 25 mph. You
realize you only have two options: hitting the other car head on or swerving into
a massive concrete wall, also head on. In the split second before impact, you
decide to:
a.
b.
c.
d.
hit the other car.
hit the wall.
hit either one - there’s no difference.
consult your class notes.
30. Pre and Post Test Results
Pre Teaching
Post Teaching
100
90
% of Students with Question Correct
80
70
60
50
40
30
20
10
0
0
5
10
15
20
Question Number
25
30
35
32. These Results Seen at Other HEIs
Blue: Manchester (post=mid)
Red: University of Minnesota – 10yrs of data (1997-2007)
5600 1st year science & engineering students
Docktor & Heller, American Institute of Physics Conference
Proceedings Vol:1064(1): 15-18, 2008
Taken from Birch, 2011
33. Are we preparing our students conceptual
mechanics understanding for 1st Year Physics?
Mature Students End of Foundation
Traditional Students Start 1st Year
100
90
% of Students with Question Correct
80
70
60
50
40
30
20
10
0
0
5
10
15
20
25
30
35
Taken from Birch, 2011
34. How does this relate to gamechanging American result ?
g
post pre
100% pre
35. How does this relate to gamechanging American result ?
g
post pre
100% pre
37. Giving the students the test twice
affects their post-test score
•
•
25% (~200 students
not given pre-test)
No statistically
significant difference
in post-test scores
Taken from
Henderson, C. (2002).
Common Concerns
About the Force
Concept Inventory, The
Physics
Teacher, 40, 542-547
38. Conclusions & Future Work
•
•
•
•
We have a mathematically rigorous module, but we
wanted to check that it addressed conceptual
understanding.
Used the proven Force Concept Inventory Test to
check student conceptual understanding pre- and
post-test.
The conceptual understanding of these students
increased significantly in the post-teaching test.
Future work:
•
•
•
Better statistics
Using versions of FCI in other languages to assess the role
language plays in developing student conceptual
understanding.
Does gender play a role in understanding mechanics
questions?
39. Bibliography
•
•
•
•
•
•
•
C. Henderson, Common Concerns about the Force Concept
Inventory, The Physics Teacher 40, 542-567, (2002)
N. Lasry et al: The puzzling reliability of the FCI, Am. J.
Phys, 79, 909-912, (2011)
D. Hestenes, M. Wells, and G. Swackhamer, Force Concept
Inventory ,The Physics Teacher, 30, 141-158, (1992)
D. Hestenes and I. Halloun, Interpreting the FCI. The Physics
Teacher 233, 502-506 (1995)
I. Halloun and D. Hestenes, Search for Coherence in FCI data (FCI
Website)
S. Bates and R. Galloway, „Diagnostic tests for the physical
sciences: A brief review‟, New Directions in the Teaching of
Physical Sciences 6 (2010)
R. Hake, "Interactive-Engagement Versus Traditional Methods: A
Six-Thousand-Student Survey of Mechanics Test,“, Am. J.
Phys., 66, 64-74, (1998)
40. The test is formative: will
students engage meaningfully?
There are several ways you can see students not
taking the test seriously
•
•
•
•
•
Refusing to take the test
Answering all A’s, B’s etc
Drawing pictures on the answer sheet
Leaving 6 or more blanks
Answering with patterns e.g. ABCDE, AABBCC etc
Taken from Henderson, C. (2002).
42. The test is formative: will
students engage meaningfully?
There are several ways you can see students not
taking the test seriously
•
•
•
•
•
Refusing to take the test
Answering all A’s, B’s etc
Drawing pictures on the answer sheet
Leaving 6 or more blanks
Answering with patterns e.g. ABCDE, AABBCC etc
Taken from Henderson, C. (2002).
43. Is this FCI really testing what it
aims to test?
•
Huffman and Heller (1995) asked: “what does the FCI
actually measure?”
•
•
•
Used correlation analysis, and found that question scores
only correlated roughly.
They interpreted this as indicating that the questions had no
underlying connectivity and were not assessing a common
principle.
This was refuted by the FCI authors (Hestenes et al.1995)
and more recently by Lasry et al (2011) who performed an
alternative correlation study and found that the question
responses were adequately correlated.
44. Is the FCI a robust test ?
•
•
•
•
High Kuder–Richardson reliability coefficient values, which
estimate the average correlation of scores obtained on all
possible halves of the test, suggest strong internal
consistency.
However, 31% of the responses changed from test to
retest, suggesting weak reliability for individual questions.
A chi-square analysis shows that change in responses
was neither consistent nor completely random.
The puzzling conclusion is that although individual FCI
responses are not reliable, the FCI total score is highly
reliable
Taken from Lasry et al. (2011)