“…Inclined to an ecological perspective, these studies have searched for specifying patterns in the ambient arrays that uniquely constrain the perception or action. Yet they have revealed that humans often rely on variables that correlate with, but are not specific to, the to-be-perceived property (e.g., Caljouw et al, 2004;Mi-chaels et al, 2001;Tresilian, 1999;van de Langenberg et al, 2006;van der Kamp et al, 1997 However, after feedback they can converge on more useful patterns in the ambient array, but often end up detecting variables that do not specify the to-be-perceived property (e.g., Fajen & Devaney, 2006;Jacobs et al, 2000Jacobs et al, , 2001Kayed & van der Meer, 2000Michaels & de Vries, 1998;Michaels et al, 2008;Runeson et al, 2000;Runeson & Andersson, 2007;van Hof, van der Kamp, & Savelsbergh, 2006, 2008Wagman, Shockley, Riley, & Turvey, 2001;Withagen & Michaels, 2005b;Withagen & van Wermeskerken, 2009). It is beyond the scope of this paper to provide a detailed description of all these studies.…”