Levels of Measurement
Categories
What is Nominal?
Did some un-anticipated event occur while the evaluation was in process and did this events affect the dependent variable?
What is History?
The term used for Accuracy
What is the Validity?
Measures what it is supposed to measure
What is Valid?
Categories in a certain order
What is Ordinal?
Were changes in the dependent variable due to normal developmental processing operating within the subject as a function of time?
What is Maturation?
The term for Consistency
What is Reliability?
Easy to administer, score and interpret.
What is easy to use?
Equal intervals
What is Interval?
Did the pre-test affect the scores on the post-test?
What is testing?
Easy to contain
What is Accessible?
Equal intervals and 0 point
What is Scale?
Did any change occur during the study in the way the dependent variable was measured?
What is instrumentation?
Measures most accurately represents the real target, goes to the heart.
What is Direct?
An effect that is the result of a tendency for subjects selected on the bases of extreme scores to regress towards the mean or subsequent tests.
What is statistical regression?