Which of the following best describes the Rulon formula method of assessing internal consistency reliability?
1
Splits the test into two halves and correlates the scores between the halves.
2
Compares scores of equivalent forms of a test administered to the same group
3
Calculates the ratio of the sum of squared deviations of half-tests' differences to the total variance.
4
Measures the consistency of score assessments by different raters or observers.