According to Piaget, children develop their ability to think through a series of stages that occur as we age.
- Sensory Motor Stage
- Pre-Operational Stage - Child is learning to use symbolism, language and general rules about mental operations. Piaget said that they are unable to conserve, unable to reverse mental operations, are egocentric and rely on their intution.
- Concrete Operational Stage - Child is able to use some sophisticated mental operations but is still limited in a number of ways.
- Formal Operational Stage.
In Piagets conservations experiments, children were asked whether the two displays were the same, before and after the transformation. In Rose and Blank's experiment they were only asked after the transformation. Children who had failed the task with two questions often succeeded when only asked one question which suggested that children only failed because they were confused by the question. R & B only looked at the number task and only tested 6 year olds, S & B aimed to find out if the same results would occur with other tasks and a wider range of participants.
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