Training conservation through the use of learning sets.
D002648:Child; D003071:Cognition; D005260:Female; D006801:Humans; D008297:Male; D008568:Memory; D010465:Perception; D011214:Practice, Psychological; D011340:Problem Solving; D011581:Psychological Tests; D012718:Set, Psychology; D012858:Size Perception; D014892:Weight Perception