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The restricted context ( " RC " ) construct is based on Jean Piaget ’s theory of equilibration and allows the outside observer to measure the way a respondent manages competing inner states of knowledge certainty during the application of confidence weights among items within the restricted total point value ( TPV ) context of the test .
 Jean Piaget
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Jean Piaget