2002g-634 art child cognitioninchildren comprehensioninchildren cross-culturalcomparison cross-culturalstudies diagnosis drawing egoisminchildren house-tree-persontechnique infant interpersonalcommunicationinchildren languageacquisition mentalillness paintings personalityinchildren pictures psychologicalaspects psychologicaltestsforchildren psychology psychologyof socialperceptioninchildren symbolism visualperception ws105v8341985