Salience, induced muscle tension, and the ability to ignore irrelevant information.
D000328:Adult; D001288:Attention; D004192:Discrimination, Psychological; D005260:Female; D006801:Humans; D008297:Male; D009129:Muscle Tonus; D010470:Perceptual Masking; D010775:Photic Stimulation; D014796:Visual Perception