The association between adverse childhood experiences and personality, emotions and affect: Does number and type of experiences matter?

Background: There is strong evidence that adverse childhood experiences (ACEs) negatively impact mental health. However, the association between ACEs and personality, emotions and affect are poorly understood. Therefore, we examined the association between composite ACE score and ACE type and personality, emotions and positive and negative affect. Methods: Three waves of data from the Midlife Development in the United States (MIDUS) study were used. ACE was the primary independent correlate. Covariates included demographic variables and survey wave. Outcome variables included generativity, personality traits (agreeableness, conscientiousness, extraversion, neuroticism, openness, agency), and affect (positive, negative). Statistical analyses included 3 approaches: (1) treatment of ACE as dichotomous, (2) ordinal composite of ACE score, and (3) three individual ACE type components to assess the association between ACE and psychological constructs. Results: Of 6323 adults in the sample, 53% were female, and 56% had a past ACE. In the adjusted analyses, dichotomized ACE was significantly associated with neuroticism (beta = 0.10; 95% CI 0.07, 0.13) and conscientiousness (beta = -0.03; 95% CI -0.05, -0.01). All ACE scores were significantly and positively associated with neuroticism and negatively associated with conscientiousness. Abuse was significantly associated with neuroticism (beta = 0.20; 95% CI 0.16, 0.24), openness (beta = 0.08; 95% CI 0.05, 0.11), conscientiousness (beta = -0.05; 95% CI -0.08, -0.02), and agency (beta = 0.06; 95% CI 0.02, 0.10). All ACE categories, except financial strain, were significantly associated with affect. Conclusion: ACEs are significantly associated with personality, emotions, and affect, with greater effect seen at higher ACE scores and with ACE abuse type, which helps support the cumulative risk hypothesis and our study hypothesis. There is a need for continued research to understand the mechanistic processes and the directionality of the association between ACEs, emotions, and behaviors to help continue to drive biopsychosocial interventions. (C) 2019 Elsevier Inc. All rights reserved.