AbstractReferences1. Adams D. , 1988 The Hitchhiker's Guide to the Galaxy (Pan, London).2. Crowder R G , 1976 Principles of Learning and Memory (Hillsdale, NJ: Lawrence Erlbaum Associates).3. Murdock B B Jr , 1974 Human Memory: Theory and Data (Potomac, MD: Lawrence Erlbaum Associates).4. Price D J D , 1965 “Networks of scientific papers” Science 149 510 – 515.5. Durgin F H Tripathy S P Levi D M , 1995 “On the filling in of the blind spot: Some rules of thumb” Perception 24 827 – 840.