The Eysenck psychoticism dimension and delinquent behaviours among non-criminals: changes across the lifespan?

This study assessed relationships between scores on Eysenckʹs psychoticism (P) scale and delinquent behaviours among high school and university students. Respondents were 347 high school students (M AGE=15.34 years) and 220 first-year university students (M AGE=19.11 years). There were notable differences across the two groups. Whereas most delinquency items correlated significantly with P among the school students, this was not the case among the university students. It is concluded that, while the P scale predicts most delinquent behaviours among younger respondents, it best predicts more serious delinquent behaviours among non-criminal adults. The results are discussed in the context of previous research using the P scale.