Geometric illusions and environment: a study in Ghana.
D000293:Adolescent; D000328:Adult; D001741:Black or African American; D044383:Black People; D003469:Culture; D004777:Environment; D005260:Female; D005869:Ghana; D006801:Humans; D007088:Illusions; D008297:Male; D008875:Middle Aged; D044465:White People