Talk:Spearman-Brown prediction formula

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Isn't the 2nd version of the equation for the SB formula upside down?

Referring to Allen & Yen (2002) and Pedhazur & Schmelkin (1991) it looks fine. --Jeffmcneill 01:35, 28 February 2007 (UTC)

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Removed from the article:

(TODO: Insert something about the history, a link to Charles Spearman, who was Brown? and including the original citation)