“…This is now referred to as Hick's Law (Hellyer, 1963;Hick, 1952;Hyman, 1953). Some exceptions to this law have been noted in specific experimental situations (e.g., Kveraga, Boucher, & Hughes, 2002;Alcorn, 1987 andLongstreth, El-Zahhar, &Alcorn, 1985; but see also Welford, 1987 for a view that disputes the conclusions of Longstreth et al), that have been referred to as ''boundary conditions'' (Wagenmakers & Brown, 2007). Beyond these, the main empirical claim of this law is still widely accepted, and it is of great importance for models of cognitive processing (e.g., McMillen & Holmes, 2006;McClelland, 2001 andUsher, Olami, &McClelland, 2002), research on cognitive ageing (e.g., Allen et al, 2004), or Human-Computer Interaction (see Seow, 2005 for a review).…”