Previous studies and reports of clinical practitioners indicate that patients report a lack in expectation change after experiencing a positive expectancy violation ("cognitive immunization") within therapeutic treatment (e.g. through exposure therapy). Thus, greater maintenance of symptoms and lower treatment benefits can be observed, especially in socially anxious individuals (Fehm, Schneider & Hoyer, 2006; Gavric, Moscovitch, Rowa and McCabe, 2017). In order to positively influence treatment processes, Rief & Glombiewski (2016) propose to incorporate expectancy-focused interventions targeting cognitive immunization. The aim of this study is to assess expectation change or lack thereof and the effects of different micro-interventions on expectation formation processes. Therefore, a modified online cyberpall-paradigm (Williams, Cheung, & Choi, 2000) will be used to induce and manipulate social expectations (inclusion vs. exclusion) within a healthy to socially anxious sample. An expectancy -focused intervention will be compared to a mindfulness-based intervention and an active control group (input about online gaming). Differences in the efficacy of interventions will be analyzed within the context of reported social anxiety and other factors (e.g. affect, personality traits).