Cognitive conflict and reversibility training in the acquisition of length conservation.
D002648:Child; D002675:Child, Preschool; D003071:Cognition; D003220:Conflict, Psychological; D005260:Female; D006801:Humans; D007088:Illusions; D008297:Male; D012193:Reversal Learning; D012858:Size Perception; D014163:Transfer, Psychology