Editing Cognitive development (section)

==== Objects ====
Within the theorized systems, infants’ core knowledge of objects has been one of the most extensively studied. These studies suggest that young infants appear to have an early expectation of object solidity, namely understanding that objects cannot pass through one another. Similarly, they demonstrate an awareness of object continuity, expecting objects to move on continuous paths rather than teleporting or discontinuously changing their locations. They also expect objects to follow the laws of gravity.<ref>{{cite journal |last1=von Hofsten |first1=Claes |last2=Spelke |first2=Elizabeth S. |title=Object perception and object-directed reaching in infancy. |journal=Journal of Experimental Psychology: General |date=1985 |volume=114 |issue=2 |pages=198–212 |doi=10.1037/0096-3445.114.2.198 |pmid=3159829 |url=https://www.harvardlds.org/wp-content/uploads/2017/01/spelke2000-1.pdf}}</ref>