title: Effects of head-tilt and practice on perception of visual direction without visible spatial framework.
mesh_terms: D000293:Adolescent; D000328:Adult; D003463:Cues; D004192:Discrimination, Psychological; D005260:Female; D006801:Humans; D008297:Male; D009949:Orientation; D011187:Posture; D011214:Practice, Psychological; D014796:Visual Perception