Abstract not found

Thepr2/#5 ofcompar2(5U cognition benefitsfre commonmeasur# acrur species. We re2O4 her on five experFO2(5 using the violation of expectancy looking timemeasur with frh2O4P5--2( rh2O macaques (Macaca mulatta), each designed to build oncurO4/ knowledge concerge2 spontaneousrontaneous24OF ofnumber Each subject, tested in only oneexperP mental condition, watched as eggplantswer placed behind ascrFP one at a time,after which thescrU/ wasr2444/ r2444/52 an outcome thateither matchedor did not match the number placed therd Subjects lookedlonger at impossible than possible outcomes in 1 3, 1 small + 1 small bigor 2small, 2 1 3, and 2 1 or 4 conditions. They failed in 2 or 3or 5 and in 1 3 conditions. Thispatter ofr2#/---- closely matches thatobser## acrr sever# prer## studies of human infants. The data allow us to test amongfour di#er4F prer4F# concer#52 thefor5U and content of the mentalrnt rntal2#F----/ under#F---- looking in these exper454O2( Object filer2#+U#U2(4OUU-- ar favor over (i) low-levelpervel245 rrvel245##U2(4 (ii)r)25O5P+2(4#P-- of continuousvartinuo such as volumeor sure2F are and (iii) analog magnitudernitude25PF+P2 ofnumber We conclude by consider4# exactly how the objecttrect25 systemrstem25 in these andother rherF exper2O4P # does and does notrt24UU++ number and how it might be oneevolutionar prolut sor of the human specific system ofnumber rberU2(F4/P2r # 2003 Published byElsevier Science (USA).