child understands world through senses and actions
playing peekaboo, child doesn’t understand what happens to objects after they disappear
object permanance
an object continues to exist even if you can't see or touch it
children know to look for the object - watches as the toy is placed under cloth B, child looks for toy where they last found it, under cloth A
preoperational - 2-7
understands world through language and mental images
Pour a glass containing same quantity of water to another with a different shape, the child says the taller glass has more
Egocentricism
children under 7 only see things from their point of view, can't perceive anyone else's
ask the child what they see, after ask them what you can see, the child responds with the same as what they see as they can't perceive your view
concrete operational - 7-11
understands world through logical thinking and categories
child will say that just because the shape of the glass has changed doesn't mean the quantity has, says glasses are equal
conservation
children can think logically
they understand the quantity of water remains the same when poured in a glass with a different shape, will say that the glasses are equal
formal operational - 12+
understands world through hypothetical thinking and scientific reasoning
instruct to them that "if you hit a glass with a feather, it will break", then ask if a feather hits a glass, what happens, they will say it will break
Evaluation
Advantages:
structured. clear
shows clearly how child's brain develops
supports abstract, logical thinking
Evaluation
Disadvantages:
doesn't account for learning disabilities
some children can see from other's point of views before age 7
cognitive brain development doesn't stop after 11/12
underestimated children's rate of development, with support they can move more quickly to the next stage of development