British Journal of Psychology Research Vol.8, No.2, pp. 8-32, May 2020 Published by ECRTD-UK Print ISSN: 2055-0863(Print), Online ISSN: 2055-0871(Online) 8 SELF-CONCEPT AND ITS INFLUENCE ON ANTISOCIAL BEHAVIOUR- PERSONALITY OF NIGERIAN SECURITY AND CIVIL DEFENCE CORPS (NSCDC) PERSONNEL IN AWKA, ANAMBRA STATE, NIGERIA Okechukwu Dominic Nwankwo, PhD, Department Of Psychology,Chukwuemeka Odumegwu Ojukwu University, Igbariam Campus, P.M.B. 6059, Awka, Anambra State, Nigeria. Lead Researcher/Correspondence Author Olofin Funke Temidayo Department Of Psychology, Baze University, Abuja, Nigeria Victor Jideofor Okoye Department Of Psychology,Chukwuemeka Odumegwu Ojukwu University, Igbariam Campus, P.M.B. 6059, Awka, Anambra State, Nigeria Gift Chinagozim Ohakwe, PhD Institute Of Theology, Paul University, Awka, Anambra State, Nigeria Precious Rosemary Ike, Department Of Psychology, Nnamdi Azikiwe University, P.M.B. 5025, Awka, Anambra State, Nigeria ABSTRACT: 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: self-concept, antisocial behavior, personality, NSCDC, Civil Defence, Anambra State, Nigeria