[The concept of invariability of an area by children between 5.5 and 7.5 years of age].
D000367:Age Factors; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D008606:Mental Processes; D010465:Perception; D013028:Space Perception
Die Auffassung der Invarianz einer Fläche bei Kindern zwischen 5;5 und 7;5 Jahren.