5 months after a IRL gun shooting in a gun shop 13 witnesses where asked to give their account. They then compared the accounts to the police records. They were also asked how stressed they felt and if they had any stress problems.
2 conditions all got invited to take part in a "lab study". In the waiting room they heard a argument in the next room. A man then came out with a pen or a knife. The PPTT then have to try identify the man.