This method has been used to 
examine a wide variety of 
infant perceptions, such as of 
size, shape, and the constancy 
of these properties by changing 
the objects’ distance or slant. 
Using a variation of this 
method, Alan Slater, Victoria 
Morison, and David Rose of the 
University of Exeter in England 
have shown definitively that 
infants only 3 days old can and 
do perceive the difference 
between simple geometrical 
shapes, such as triangles, 
squares, circles, and crosses. 
After habituating to one of 
these shapes, the infants 
clearly preferred to look at a 
new one when given the old 
and the new together. Contrary 
to other views of infant 
perception, they agree with 
Marshall Haith, who maintains 
that the newborn infant is not 
passive but is a "dynamic 
information seeker."