The study examined “self-concept and its influence on antisocial behaviour/personality of Nigerian Security and Civil Defence Corps (NSCDC) personnel in Awka, Anambra State”, with 327 participants sampled through cluster and incidental methods. Valid/reliable Self-Concept and Psychopathic Deviant Scales measured self-concept and antisocial behaviours respectively, adopting cross-sectional design and ANCOVA statistics. Findings: Self-concept significantly contributed to NSCDC personnel’s antisocial personality (p< .001≥ .000; N = 327; Fs = 3.057, 3.551, 4.198, & 12.950). Self-concept did not significantly influence the personnel’s psychopathic personality (p< .001≥ .000; F = .934; N = 327). Self-concept significantly influenced the personnel’s antisocial personality (p< .001≥ .000; F = 5.691; N = 327), criminal behaviour (p< .001≥ .000; F = 6.797; N = 327), fraudulent behaviour (p< .001≥ .000; F = 10.559; N = 327), and delinquency (p< .001≥ .000; F = 5.610; N = 327). Recommendation: NSCDC should inculcate healthy/ethnics-oriented self-concepts in the personnel.
Keywords: Anambra State, Civil Defence, NSCDC, Nigeria, Personality, Self-Concept, antisocial behavior