By comparing the two models, it was hoped to "validate a general personality structure within a sample of offenders in order to determine whether there are any required adaptations of the FFM and to verify whether the FFM FFM can offer some validation of Eysenck's theory of personality. » With this study, the researchers had a few predictions they hoped to prove. The researchers predicted that participants would show high levels of extroversion in their personality and low levels of emotional stability in their scores, which would prove high levels of neuroticism according to the PEN model. They also predicted that participants who spent a lot of time in prison would demonstrate low levels of extraversion. They predicted that younger prisoners would report higher levels of extraversion than older prisoners and, finally, they predicted that the FFM fit the data better than a three-factor PEN.