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. Author manuscript; available in PMC: 2013 Jan 16.
Published in final edited form as: Psychometrika. 2010 Mar;75(1):158–175. doi: 10.1007/S11336-009-9137-9

Figure 2.

Figure 2

Change of estimated slope with known first point. When in a perfect data set a positive error is introduced while assuming a known first point, the slope estimate will increase, no matter where the error is introduced in the sample.