Talk:Spearman–Brown prediction formula

Untitled
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)

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