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Samuel & Bryant attempted to challenge Piagets
theory of cognitive development
Piaget believed that development is a systematic
and structured process
Piaget thought that intellectual development
happened in stages
A child would only go to the next stage once it had
completely mastered the first one
Piaget outlined four stages of cognitive
development and gave approximate ages at which
children reach those stages:…read more

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1) Sensory Motor Stage (Birth ­ 18 months) ­
Gains understanding of environment by using
its senses in combination with environment
2) Pre operational Stage (18m ­ 7y) ­ General
rules about mental operations ­ Able to
express ideas and use language
3) Concrete Operational (7y ­ 12y) ­ Able to
sophisticated mental operations- Child is now
4) Formal Operational (12+) - Most sophisticated
stage of thinking…read more

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Conservation Experiment
Piaget devised numerous tests which
highlighted the errors children make with
certain thinking
The most well known test Piaget carried
out to show the limitation of children
thinking in the PRE OPERATIONAL stage
was the CONSERVATION experiment…read more

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Conservation Experiment
If you show a child two beakers with the same amount of
water- one beaker tall the other beaker short- The child will
say the TALL one contains more water
If you roll a piece of clay into a sausage, the other into a ball,
the sausage shape will appear larger
If there are five buttons spread out and five close together,
the child thinks the spread out one contains more
Piaget said that children cannot conserve mass, volume or
Piaget argued the inability to conserve is due to the Childs
failure to understand that things remain the same, despite
changes in their appearances…read more

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To challenge Piaget's
findings by altering
the method used by
Piaget…read more

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