These data were originally deposited by Crespi and colleagues (Crespi B, Read S, Salminen I, Hurd P. Data from: A genetic locus for paranoia. Dryad Digital Repository. 2018.) These data were used to test an alternative hypothesis to analyses in Crespi et al (Crespi B, Read S, Salminen I, Hurd P. A genetic locus for paranoia. Biol Lett. 2018;14(1).) Three columns were added to the original data, which reflect basic calculations for the analyses presented in this paper.