Scratchers and Implementation Student Response Test Scores

Scratcher (IFAT) Formsfor Conceptual Test

Questions inIntroductory Courses

July 29 2015Nicole Ackerman

Agnes Scott College

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Scratchers and Implementation Student Response Test Scores

USING IF-AT FORMS

1st Choice

2nd Choice

3rd Choice

Wrong

Identification

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Scratchers and Implementation Student Response Test Scores

USING IF-AT FORMS

1st Choice

2nd Choice

3rd Choice

Wrong

Identification

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Scratchers and Implementation Student Response Test Scores

USING IF-AT FORMS

1st Choice

2nd Choice

3rd Choice

Wrong

Identification

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Scratchers and Implementation Student Response Test Scores

USING IF-AT FORMS

1st Choice

2nd Choice

3rd Choice

Wrong

Identification

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Scratchers and Implementation Student Response Test Scores

USING IF-AT FORMS

1st Choice

2nd Choice

3rd Choice

Wrong

Identification

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Scratchers and Implementation Student Response Test Scores

USING IF-AT FORMS

1st Choice

2nd Choice

3rd Choice

Wrong

Identification

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Scratchers and Implementation Student Response Test Scores

IMPLEMENTATION

Conceptual“Clicker”

Questions

Lecture

Own pace,in Groups

In-Class Review

8 MCQuestions

(50%)

In-Class Tests(x4, 50 min)

18 MCQuestions

(50%)

Final Exam(3 hr)

MC = Conceptual Multiple Choice

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Scratchers and Implementation Student Response Test Scores

EXAMPLE QUESTION

For the image shown to the right ofa conducting bar moving in a mag-netic field, which of the images be-low correctly represent the inducedcharge distribution?

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Scratchers and Implementation Student Response Test Scores

STUDENT FEEDBACKHOW DOES THE USE OF SCRATCHERS IMPACT TEST ANXIETY?

Positive

Anxiety0

20

40

60

80

100

%o

fRes

po

nse

s 20132014

“I like the scratchers a lot. I think itwas very helpful because itprevented me from second guessingmy answers, and I was able to moveon ‘for good’ after using thescratcher.”

“The scratchers added a little bit ofstress, but the benefit of them isworth it. It was good to haveimmediate feedback, and I like thatthere is an opportunity for partialcredit on multiple choice questions.”

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Scratchers and Implementation Student Response Test Scores

CORRELATION WITH “KNOWLEDGE”DO SCRATCHERS PROVIDE BETTER ASSESSMENT OF PHYSICS KNOWLEDGE?

0.2 0.4 0.6 0.80

0.2

0.4

0.6

0.8

1

CSEM or FCI Post Score

Co

rrec

t2n

dA

nsw

ers

(%o

fPo

ssib

le)

E&M 2014Mech 2014E&M 2015RegressionR2 = 0.248Guessing

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