Test Construction
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EPPP KNOWLEDGE · FLASHCARDS
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QUESTION
What is the discrimination index (
D
D
D
) using upper and lower groups in item analysis?
QUESTION
What is sensitivity in diagnostic testing?
QUESTION
Using Spearman-Brown, find
r
n
e
w
r_{new}
r
n
e
w
if
r
o
l
d
=
0.60
r_{old}=0.60
r
o
l
d
=
0.60
and length is doubled (
n
=
2
n=2
n
=
2
).
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ANSWER
r
n
e
w
=
0.75
r_{new}=0.75
r
n
e
w
=
0.75
. Increasing length enhances reliability by reducing measurement error as per the prophecy formula.
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