• Don't slap the fish: The relationship between dietary Omega-3 intake and physical aggression is mediated by motor inhibition in response to distressed faces

      Fido, Dean; Heym, Nadja; Bloxsom, Claire A. J.; Hunter, Kirsty A.; Gregson, Michael; Sumich, Alexander L.; University of Derby; Nottingham Trent University; Auckland University of Technology (Elsevier, 2020-05-25)
      The innate violence inhibition mechanism (VIM) purportedly regulates maladaptive aggressive behavior through motor inhibition, in response to expressions of distress, and is implicated in psychopathy-related aggression. Deficiency in eicosapentaenoic acid (EPA; an omega-3 fatty acid) is implicated in aggression and callous-unemotional (CU) traits, however, its relationship to the VIM remains unknown. Two studies tested relationships between EPA intake, personality (aggression, CU traits), and electrophysiological indices of the VIM. In study one (N=98), participants completed omega-3 intake (FFQ), CU traits (ICU), and aggression (BPAQ) measures. Physical aggression correlated positively with callousness and negatively with EPA intake. CU traits were unrelated to EPA. In study two (N=47), participants completed the same measures and an electroencephalography assessment of VIM. Stop-P300 amplitude (motor inhibition success) in response to facial expressions of distress mediated the relationship between EPA intake and physical aggression. This is the first demonstration of an association between EPA intake and electroencephalographic indices of the VIM. Findings support a role of EPA in regulating aggression through networks involved in distress-cued executive control over behaviour; and provide supporting data to direct future trial designs for nutritional supplementation in non-clinical, clinical and forensic arenas.
    • Intrasexual competition as a predictor of women’s judgements of revenge pornography offending

      Fido, Dean; Harper, Craig, A; Davis, Mia; Petronzi, Dominic; Worrall, Sophie; University of Derby; Nottingham Trent University (Sage, 2019-12-25)
      Recent legislative developments have led to a marked increase in the empirical investigation of motivations and judgements of so-called acts of ‘revenge pornography’ offending. In two independently-sampled studies, we used moderation analyses to investigate whether higher levels of intrasexual competition predicted more lenient judgements of revenge pornography offences as a function of sex (Study 1, N = 241), and whether such relationships would be further moderated by physical attractiveness (Study 2, N = 402). Potential covariates of callous-unemotional traits, empathy, and victimization history were controlled for. Opposing our hypotheses, we consistently observed a trend for higher levels of intrasexual competition being associated with more lenient judgements of revenge pornography offences involving male victims by female participants. The results are discussed in terms of intrasexual competition potentially sharing variance with unobserved constructs in the wider sexological literature, and of the key relevance of these findings for future empirical investigation into judgements of non-consensual image-based offending. Open data and a preprint of this paper are available at https://osf.io/y29fq/?view_only=568a2c403fcf428280914c149063db95.