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Strength of Materials (SOM) Concept Inventory: Jim Morgan, Jim Richardson

This document discusses the development of a Strength of Materials (SOM) concept inventory by Jim Morgan and Jim Richardson. It outlines the key SOM concepts the inventory aims to assess, including stresses, strains, buckling and material failure. The development process involved interviews with students and professors and psychometric testing. Preliminary results found a moderate correlation between inventory scores and course grades. The inventory is being modified and a beta version will be released in January 2002.

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Sameera Srivathsa
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37 views13 pages

Strength of Materials (SOM) Concept Inventory: Jim Morgan, Jim Richardson

This document discusses the development of a Strength of Materials (SOM) concept inventory by Jim Morgan and Jim Richardson. It outlines the key SOM concepts the inventory aims to assess, including stresses, strains, buckling and material failure. The development process involved interviews with students and professors and psychometric testing. Preliminary results found a moderate correlation between inventory scores and course grades. The inventory is being modified and a beta version will be released in January 2002.

Uploaded by

Sameera Srivathsa
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PPT, PDF, TXT or read online on Scribd
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Strength of Materials (SOM)

Concept Inventory
Jim Morgan, Texas A&M University
Jim Richardson, University of Alabama
Presentation Outline
• Background
• Preliminary Assessment Results
• Example Questions from Inventory
Purpose
Purpose: Assess students’ mastery of
SOM concepts

Motivated by personal experience


SOM’s Place in the Curriculum

• Calculus Physics Statics SOM


• SOM concepts are new to students
• May preclude “pre-testing”
• SOM concepts are essential to follow-on
courses
SOM Concepts
• Shear & Bending Moment Distributions
• Stress & Strain
– Axial & Torsional on Rods
– Axial, Shear & Bending on Beams
• Axial Buckling
• Pressure Vessels
• Failure of Ductile & Brittle Materials
Development Process
• Met with developer of FCI
• Shared with professors
• Interviewed students
• Pyschometric assessment (on students
who have already taken SOM)
• Modify concept inventory to do
• Beta version available by Jan. 2002
Correlation of Inventory to SOM Grade

25

20
Score on Inventory

15

10
R = .343
R-square = .118
F (28,1) = 3.595
5 a = .069

0
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5
Grade in SOM Course
26 %

42 %
32 % correct answer
48 % 40 % 12 %

correct
answer
88 %
correct
answer

2%

10%
Conclusion
• Good start on a SOM concept inventory
• Psychometrics show it needs more work
• We plan to modify the inventory this Fall
• Release the beta version in Jan. 2002

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