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--- learning_theories:stage_theory_of_cognitive_development [2011/04/11 13:59]
jpetrovic [Criticism]
+++ learning_theories:stage_theory_of_cognitive_development [2011/04/11 14:02]
jpetrovic [Criticism]
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 One of the criticisms of Piaget's theory lies on the fact that nor him or coworkers didn't leave an instrument for diagnosing child's current stage of cognitive development.
-Still, as a border between preoperational period and operational period Piaget suggested conservation experiments. For example, two equal glasses filled with liquid are presented to a child, after which liquid out of one glass is poured into a third, more narrow glass. The child is then asked which glass holds more liquid. Only a child in the operational  period should realize both glasses hold equal amount of liquid.
+Still, as a border between preoperational period and operational period Piaget suggested conservation experiments. For example, two equal glasses filled with liquid are presented to a child, after which liquid out of one glass is poured into a third, more narrow glass. The child is then asked which glass holds more liquid. Only a child in the concrete- or formal-operational  period should realize both glasses hold equal amount of liquid.
+According to Piaget's theory, the crossing between the stages cannot be overcome with any training, yet a number of experiments((For details see: ))
 Various criticisms of Piaget's work include:

Learning Theories