Investigate the effect of state anxiety level in healthy population using emotional Stroop test to find out the effect of threat-related words on decreasing the reaction time as distractors compared with neutral words. State anxiety will be evaluated using State-trait Anxiety Inventory—Short form (Marteau & Bekker, 1992). Hypophysis will be there will be an interaction effect between the level of state-trait anxiety and valence of emotional stimuli, threat related stimuli will increase Stroop interference the most when anxiety level is high