Katie Is 4 Months Old and She Can Recognize That

Multiple Choice

Katie is 4 months old and she can recognize that a toy truck is one whole object. Which cue is she using?

A) the truck is all the same color indicating one object
B) the parts of the truck move together indicating that it is one object
C) her mother has referred to it verbally as one object
D) she assumes everything that if parts touch it is one whole object