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General Discussion2097attentional biases). By making the participation in experiments more accessible to the general public, researchers can accomplish two things at once: they can involve taxpayers more strongly in research, following a citizen science approach, as well as have more generalizable results without necessarily obscuring their effects of interest. Especially during the COVID-19 pandemic, research transitioned from physical laboratories to online platforms. With the development of better tools to perform research online, researchers often continued to choose online over in-person setting, reaching a large and diverse audience in little time. When comparing findings from the exact same task in an online versus laboratory setting in Chapter 5 (with the exception of facial muscle activity sensors in the lab), many, yet not all, findings could be replicated. Thus, as it is generally recommended in psychological research, studies should be replicated, and it seems particularly interesting to see which effects hold when the setting changes. While, from a functional perspective, emotional signals should be processed and interpreted similar across settings, contextual influences in processing others%u2019 emotions, such as observing a smile in a funeral versus a wedding context (Kastendieck et al., 2021), have been described in the literature, and should therefore not be neglected. The different studies within this thesis not only employed different tasks to target different stages in facial emotion processing, but also experimented with different task parameters. One example of this is the nature of the (facial) emotional expressions. In the first two experimental chapters of this thesis, commonlyused static images of acted expressions from the NimStim database were used (Tottenham et al., 2009). Results in studies on facial emotion perception in autism (Enticott et al., 2014; Keating & Cook, 2020; Rigby et al., 2018), and sporadically also in social anxiety (Torro-Alves et al., 2016), show specific alterations in processing dynamic compared to static facial expressions. Moreover, acted stimuli are exaggerated representations of prototypical facial expressions and do not represent the subtlety with which emotional expression can appear in daily life. For these reasons, our research group developed a new stimulus set of spontaneously evoked, dynamic emotional expression with a controlled background and matched timing, based on the FEEDTUM database (Wallhoff et al., 2006). The development of this stimulus set then allowed us to test facial emotion perception of more naturalistic stimuli than used in most previous work, while the standardization procedure still allowed us to compare our results to