Orientation, Spatial spatial orientation 19 Humans 18 human 18 vision 9 Visual Perception 8 Orientation 7 orientation 7 Attention 6 Male 6 male 6 Ensemble perception 5 Female 5 Perception 5 attention 5 female 5 physiology 5 Adult 4 Photic Stimulation 4 adult 4 photostimulation 4 Hand Strength 3 Psychomotor Performance 3 Reaction Time 3 Space Perception 3 depth perception 3 hand strength 3 perception 3 procedures 3 psychomotor performance 3