Two forms of Wilder's Law of Initial Values are generally recognized, the raw-score form and the change-score form. Given the regression equation of either form, the other can be derived algebraically. If the graph of a given form of the law is linear, the graph of the alternative form may be determined easily.
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References
1.
WilderJ.The law of initial values in neurology and psychiatry: Facts and problems. J. nerv. ment. Dis., 1956, 125, 73–86.
2.
WilderJ.Stimulus and response: The law of initial value. Bristol: John Write, 1967.
