http://digfir-published.macmillanusa.com/cogtk/size constancy.html\t Chapter 1. Size Constancy \t50b9324cb11c0ff51a000000 http://digfir-published.macmillanusa.com/cogtk/size constancy_dlap.xml\tDLAP questions\t50b9324cb11c0ff51a000000