amp; Wright, 2018; Wachs et al., 2021). Adopting the social learning theory, we investigate whether frequent exposure fosters learned cyberhate behaviours in the form of cyberhate aggression. We also explore whether moral disengagement mediates this association. We will use longitudinal online survey data from 3,087 Czech adolescents (ages 11-16, M=13.47, SD=1.74; 50.1% boys) collected over four waves, six months apart, in 2021-2022. We used quota sampling to ensure (1) that included households represent Czech households with children in terms of SES, region, and municipality size, and (2) balanced age and gender groups. We measured cyberhate exposure and perpetration using two single-item measures and moral disengagement using a four-item scale (adapted from Garland et al., 2016). We will test within-person longitudinal effects between these variables using the random intercept cross-lagged panel model (Hamaker et al., 2015).