The Ninth Amendment states that the list of rights enumerated in the Constitution is not exhaustive, and that the people retain all rights not enumerated. The Tenth Amendment assigns all powers not delegated to the United States, or prohibited to the states, to either the states or to the people.
Many of our standardized tests in psychology use interval scales. An IQ (Intelligence Quotient) score from a standardized test of intelligences is a good example of an interval scale score. IQ scores are derived from a lengthy testing process that requires the participant to complete a number of cognitive tasks.
It is used to aggregate Gain Scores from different programs, even those using different standardized tests. The NCE, unlike the NP, is an equal-interval scale and can be treated arithmetically. The difference between two successive scores on the scale has the same meaning throughout the scale.