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Lesson 1:
Outline
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Notes
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Glossary
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Presentation
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Activities
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Directed Questions
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Assessment
Directed Questions for Reliability
Multiple Choice
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1.
Mrs. Jackson gave two versions of her Algebra test to her class. She then correlated the results of the two assessments. The value was 0.60. What type of reliability did Mrs. Jackson compute? How would you interpret the value of her reliability statistic?
example:
She used parallel test forms reliability.
A value of 0.60 means that the scores on the two tests were not very reliable.
2.
Mr. Conway, a physical education teacher, timed his students during a 1-mile run. One week later, he timed his students again. What type of reliability is Mr. Conway measuring? What are some of the factors that may add random error into his statistic?
example:
Test-retest reliability.
Factors that may add error into his statistic include whether or not his students exercised more during that one-week period, whether or not they ate breakfast both mornings of the run, whether or not they were healthy both days, etc...
3.
Ms. Sanchez administered a 20-word spelling test to her second grade class. Each word was worth 1 point. What are some ways Ms. Sanchez could divide her test to calculate the internal reliability using the split-half reliability statistic?
example:
Divide the test by even and odd number questions, use the first half and the second half of the test, randomly select 10 spelling words for one group and use the other 10 for the other group, etc...
Principles of Measurement
