explain anxiety has a positive effect on recall and procedure
-witnessing stressful event creates anxiety thru physiological arousal. the fight or flight response is triggered increasing alertness.
-john yuille and judith cutshall conducted study of actual shooting in gun shop in vancouver. shop owner shot thief dead, 21 witnesses, 13 took part in study
-they were interviewed 5 months after incident and these interviews were compared with original police interviews at time of shooting
-accuracy determined by number of details reported in each account, stress levels were also asked abt