[...] rank measurements and ensure that the intervals between the rankings are equal.
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Subject 2. Measurement Scales o point for ordinal scales, since the zero point is chosen arbitrarily. The lowest point on the rating scale in the example was arbitrarily chosen to be 1. It could just as well have been 0 or -5.
<span>Interval scales rank measurements and ensure that the intervals between the rankings are equal. Scale values can be added and subtracted from each other.
For example, if anxiety was measured on an interval scale, a difference between a score of 10 and a score of 11 w
last interval [days]
repetition number in this series
scheduled repetition interval
last repetition or drill
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