Evidence suggests an association between childhood maltreatment and adulthood narcissism. However, researchers disagree about the mechanisms that underlie this relationship and the factors that might influence it. This gap in our knowledge is unfortunate because narcissism is a common phenomenon in modern society, and researchers report an increase of narcissism scores during the last few decades (d=0.41). One mechanism that has been hypothesized to link childhood maltreatment and adulthood narcissism is dissociation. Children in adverse environments use dissociative states as survival mechanisms. Psychic numbing, splitting and depersonalization helps them to escape from unbearable situations but concurrently captures them in a lonely, self-centered world. On this view, childhood maltreatment may lead to a narcissistic personality through the mediator dissociation. Furthermore, the link between childhood maltreatment and dissociation might be vulnerable to intervening variables, such as shame. Since dissociation might help maltreated children to escape from unbearable situations, unpleasant emotions such as shame may further encourage dissociation. Thus, shame, as we hypothesize, might moderate the relationship between childhood maltreatment and dissociation. That is, under high levels of shame, the link between childhood maltreatment and dissociation will be increased. In the present project, we will analyze a sample of 323 well-functioning women. To cover one of the limitations of a cross-sectional study, we assessed narcissism, dissociation, and shame at two time points (interval of 6 months) and we will use the mean scores of them, as previously suggested (Welten et al., 2018). The inclusion criteria were being Hebrew-speaking, and 18 years of age or older. Participants were excluded if they completed the questionnaire in less than seven minutes. The Childhood Trauma Questionnaire (CTQ; Bernstein & Fink, 1998) was used to access childhood maltreatment and the Pathological Narcissism Inventory (PNI; Schoenleber et al., 2015) was used to assess both vulnerable and grandiose narcissism. We assessed dissociation with the Dissociative Experiences Scale (DES; Bernstein & Putnam, 1986) and shame with the Experience of Shame Scale (ESS; Andrews et al., 2002). Our first step will be to analyze how childhood emotional, physical, and sexual abuse as well as emotional and physical neglect are related to narcissism. Consistent with previous findings, we expect to find positive correlations between each of the maltreatment types and both vulnerable and grandiose narcissism. We will also run linear regression analyses with the covariates of age, socioeconomic status, relational status and education. As a second step, we will conduct a Latent Class Analysis (LCA). By means of this person-centered analysis, we will categorize the participants and identify clusters of maltreatment experiences related to each type of narcissism. Our third step will be to better understand the mechanism underlying the association between childhood maltreatment and narcissism. We hypothesize that dissociation will mediate the relationship between childhood maltreatment and both vulnerable and grandiose narcissism. We will run a mediation analysis to test whether the link between childhood maltreatment and narcissism travels through dissociation. Our fourth step will be to test whether shame moderates the mediational pathway tested in step three. Assuming that the link between childhood maltreatment and narcissism travels through dissociation, we will test the hypothesis that shame moderates this mediational pathway. **References** Andrews, B., Qian, M., & Valentine, J. D. (2002). Predicting depressive symptoms with a new measure of shame: The experience of shame scale. *British Journal of Clinical Psychology, 41*(1), 29–42. Bernstein, D., & Fink, L. (1998). *Childhood trauma questionnaire: A retrospective self-report: Manual.* San Antonio, TX: The Psychological Corporation. Bernstein, E. M., & Putnam, F. W. (1986). Development, reliability, and validity of a dissociation scale. *The Journal of Nervous and Mental Disease, 174*, 727-735. Schoenleber, M., Roche, M. J., Wetzel, E., Pincus, A. L., & Roberts, B. W. (2015). Development of a brief version of the Pathological Narcissism Inventory. *Psychological Assessment, 27,* 1520-1526. Welten, M., Kroon, M.L., Renders, C.M., Steyerberg, E.W., Raat, H., Twisk, J.W., & Heymans, M.W. (2018). Repeatedly measured predictors: A comparison of methods for prediction modeling. *Diagnostic and Prognostic Research.*