title: Perception of verticality by boys and girls in grade 6.
abstract: Understanding of the principle of verticality was tested by having 246 sixth grade students draw a pendulum on pictures of an abstract shape similar to a steeple. Girls performed more poorly than boys. Verticality was apparently much better understood by subjects than horizontally, also tested to provide a comparison.
mesh_terms: D002648:Child; D003210:Concept Formation; D005260:Female; D005556:Form Perception; D006801:Humans; D008297:Male; D009949:Orientation; D012737:Sex Factors