3. Commonly used terms…
“She has a valid point”
“My car is unreliable”
…in science
“The conclusion of the study was not
valid”
“The findings of the study were not
reliable”.
4. “The soundness or appropriateness of a test
or instrument in measuring what it is
designed to measure”
(Vincent 1999)
“Degree to which a test or instrument
measures what it purports to measure”
(Thomas & Nelson 1996)
5. Meter and scale.
Test for measuring scientific
Purpose is important in validity.
7. Whether the individual items of a test
represent what you actually want to assess.
OR
Content validity is the degree to which a test
measures to intended content area.
8. A table of specification is a device which
results in a balanced coverage of contents.
9. Unclear Directions.
Reading vocabulary and sentence structure is too
difficult.
Inappropriate level of difficulty of the test items.
Poorly constructed test items.
Ambiguity
10. Test items inappropriate for the outcomes
being measured.
Test too short.
Improper arrangements of items.
Identifiable patterns of answers.
11. Define
“…the degree to which a test or measure
produces the same scores when applied in the
same circumstances…”
OR
“the degree to which a test consistently
measures whatever it measures.”
12. Reliability refers to the consistency of a
measure of a concept.
The reliability coefficient must range from
0.00 to 1.00.
13. Reliability is needed to obtain valid
result.
(but one can be consistently off target)
A Valid Test is always reliable but a reliable
test is not necessary valid.