Answer
1844
Millennium: 2nd millennium
Centuries: 18th century 19th century 20th century
Decades: 1820s 1830s 1840s 1850s 1860s
Years: 1841 1842 1843 1844 1845 1846 1847
Answer:
Sensorimotor Stage
Explanation:
Sensorimotor Stage: This is the very first stage of Jean Piaget's theory of cognitive development. The sensorimotor stage starts from birth and lasts around two years of age.
Object permanence is considered to be the important attainment of this stage and states that an object exists even if it is not in a person's visibility or hidden. Through object permanence, a person can develop mental representation that is schema of a particular object.
The earliest stage would be the sensorimotor stage.