These order values from worse to better (e.g. does not meet, inconsistently meets, meets, inconsistently exceeds, consistently exceeds) but the magnitude of difference between values is unknown and unlikely to be equal.
What are ordinal scales
100
The level at which students get 90-95 % of the answers correct.
What is mastery level
100
Scores we can never accurately compare
What are raw scores?
100
The ability to generalize scores; types include: alternate form, internal consistency, and test-retest
What is reliability
100
A score is equal to or better than 75 percent of test takers
What is a PR of 75
200
Ratio scales with no absolute or logical zero; an example might be a classroom spelling test
What are equal-interval scales
200
Level where material is too difficult for a student
What is frustration level
200
For eligibility decisions, a test should have a reliability at this standard or above
What is .90
200
The degree to which a test measures what it claims to measure; to determine this one may look at content and the constructs
What is validity
200
A student answered the same number of questions correctly as the average second grader.
What is GE of 2
300
A type of curve that represents a lot of spread in the scores and thus can be visualized as "flat"
What is a platykurtic curve
300
Point at which a student can perform without assistance; more than 95% correct
What is independent level
300
For screening decisions, the reliability coefficient should be at this level
What is .80
300
Measures of the extent to which scores differ from one another
What are measures of dispersion
300
The "average" range for a Standard Score (SS) on the WJ-III
What is 90-110
400
A curve with fast rising distributions; has "peaks"
What is a leptokurtic curve
400
Level that is challenging yet student is likely to be successful.
What is instructional level
400
When one adds together scores and divides by the number of students tested, one is calculating this measure of dispersion
What is mean
400
An index of test error; when this is large there is a lot of uncertainty (cannot be very confident of individual's true score)
What is standard error of measurement
400
Having a PR of 3-16 means a student's performance falls in this range on the WJ-III