A paper titled “Correlations of multiple rider behaviors with self-reported attitudes, perspectives on traffic rule strictness and social desirability“, authored by Apostolos Ziakopoulos, Dimitris Nikolaou and George Yannis is  published in Transportation Research Part F: Traffic Psychology and Behaviour. Numerous statistical relationships were discovered and quantified correlating the four examined unsafe rider behaviors with eight latent unobserved variables. All covariances between unsafe behaviors were found to be positive and statistically significant, indicating that a rider who will engage more frequently in every single one of the four examined unsafe riding behaviors is more likely to also engage in all the others as well.