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Bokie1213 Bokie1213
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6 years ago
Which variable does the experimental researcher manipulate?
 
  a. Independent
  c. Extraneous
  b. Attribute
  d. Dependent

Ques. 2

List four factors that affect the score reliability of a measuring instrument.
 
  What will be an ideal response?

Ques. 3

The split-half coefficient for a test was found to be .70. What is the score reliability of the full-length test?
 
  What will be an ideal response?

Ques. 4

Other things being equal, would the following practices increase or decrease score reliability?
 
  a. The teacher decided to give a short quiz instead of the usual chapter test.
  b. The teacher added five easy test items that everyone could answer correctly.
  c. The teacher included 20 spelling words instead of 10 words on the spelling test.

Ques. 5

Determine the standard error of measurement for a test with a standard deviation of 15 and a score reliability coefficient of .91.
 
  What will be an ideal response?

Ques. 6

Explain two procedures that one could use to determine the score reliability of an achievement test.
 
  What will be an ideal response?

Ques. 7

Distinguish between concurrent and predictive evidence of validity.
 
  What will be an ideal response?

Ques. 8

Assume you have developed a new instrument to measure introversion/extroversion in teachers. Would you assess score validity or reliability first? Why?
 
  What will be an ideal response?
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Replies
wrote...
#1
6 years ago
Answer to #1

A

Answer to #2

ANS:
The length of the instrument, the variable being measured, the technique used for estimating reliability, and the heterogeneity of the subjects on the variable being measured.

Answer to #3

ANS:
.82

Answer to #4

ANS:
a.
Decrease
b.
No effect
c.
Increase

Answer to #5

ANS:
Standard error of measurement = 4.5

Answer to #6

ANS:
If there are two forms of the test, then one could administer both forms and correlate subjects' scores on the two forms. If there is only one form, then administer the test, split the test into even- and odd-numbered items, and correlate scores on the two halves. Apply the Spearman-Brown formula to determine the reliability of the full-length test.

Answer to #7

ANS:
Concurrent evidence is the relationship between scores on a measure and a criterion obtained at the same time. Predictive evidence is the relationship between scores on a measure and a criterion available at a future time.

Answer to #8

ANS:
One would want to establish validity first. If the test doesn't measure what it is supposed to measure, then it would not be useful regardless of its reliability.
Bokie1213 Author
wrote...
#2
6 years ago
This is very helpful, my teacher this year is not good
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