PSY 606 Exam 2 || All Questions Answered Correctly.
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Course
PSY 606
Institution
PSY 606
If you wish to show stability of a test, you would calculate:
a) Cronbach's alpha
b) Split-half reliability
c) Test retest reliability
d) SEM correct answers c) Test retest reliability
If someone's WAIS-IQ was 103, and the published SEM is 3 pts, then the 95% confidence interval for that sco...
PSY 606 Exam 2 || All Questions Answered Correctly.
If you wish to show stability of a test, you would calculate:
a) Cronbach's alpha
b) Split-half reliability
c) Test retest reliability
d) SEM correct answers c) Test retest reliability
If someone's WAIS-IQ was 103, and the published SEM is 3 pts, then the 95% confidence
interval for that score would be:
a) 103 +- 3
b) 103 +- 6
c) 95 +- 3
d) 95 +- 6 correct answers b) 103 +- 6
A way of estimating the average correlation among all pairs of items for variably-scored items
(e.g., Likert scales) is:
a) KR-20
b) Split-half
c) Alternate forms
d) Cronbach's alpha correct answers d) Cronbach's alpha
The primary source of error for split-half reliability is:
a) statistical factors (restricted range)
b) random or chance differences
c) true change
d) item sampling correct answers a) statistical factors (restricted range)
The Spearman-Brown prophecy formula is used to correct which of the following estimates of
reliability:
a) test retest
b) split half
c) alternate forms
d) all of the above correct answers b) split half
The primary source of error for test retest is:
a) true change
b) item sampling
c) random or chance differences
d) statistical factors (restricted range) correct answers a) true change
The reliability coefficient (rxx) is essentially correlating the test score with a:
a) different test measuring something similar
b) another version of the same test
c) some criterion measure
d) all of the above correct answers b) another version of the same test
, Which of the following is a short-cut method of calculating the inter-item correlation for tests
with dichotomous items?
a) Cronbach's alpha
b) Alternate forms
c) Test retest
d) KR-21 correct answers d) KR-21
If you want to validate an employee screening test and compare scores to supervisor's ratings one
year later, this would constitute what type of validity?
a) content
b) construct
c) predictive
d) concurrent correct answers c) predictive
For clinical scales (e.g., anxiety, depression) it's a good idea to manipulate what type of validity?
a) face
b) content
c) criterion-related
d) construct correct answers a) face
Given: y' = 5X + 10 and Se = 3, which of the following is the 68% confidence interval for X = 5?
a) 35 plus or minus 6
b) 25 plus or minus 6
c) 35 plus or minus 3
d) 25 plus or minus 3 correct answers c) 35 plus or minus 3
If p = .65 and D = .20, we could characterize this item as:
a) difficult and extrinsic ambiguity
b) easy and extrinsic ambiguity
c) difficult and intrinsic ambiguity
d) easy and intrinsic ambiguity correct answers d) easy and intrinsic ambiguity
If the bottom scoring group gets an item correct more often than the top scoring group, this
would imply:
a) easy item
b) extrinsic ambiguity
c) intrinsic ambiguity
d) difficult item correct answers c) intrinsic ambiguity
The major advantage of item-total (rpb) over discrimination index (D) is that the item-total
correlation:
a) uses significance as a criterion of acceptable discrimination thereby taking sample size into
account
b) is a more sensitive measure of discrimination
c) always produces a larger value
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