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Theoretical background: Depressiveness is characterized by a hyposensitivity towards rewards (Alloy et al., 2016; Katz et al., 2020; Keren et al., 2018). However, there is not only evidence for dysfunctional reward processing in depression. With regards to eating disorders, numerous studies revealed aberrant reward-related responses (Harrison et al., 2010). Effects have even been shown independent of food-related rewards (Eneva et al., 2017; Jappe et al., 2011). Furthermore, there are some investigations, which suggest that patients with social anxiety display a neural hyposensitivity concerning reward anticipation compared to controls (Richey et al., 2014; Richey et al., 2017). In addition, research relating substance use disorders with dysfunctional reward processing is frequent (e.g. Luijten et al., 2017) and even considers a hypersensitivity towards non-substance-related rewards (García-García et al., 2014). These findings are in line with the Research-Domain-Criteria (RDoc) initiative, supporting dimensional and transdiagnostic investigations of key mechanisms in psychiatric disorders (Nusslock & Alloy, 2017). However, there is a lack of studies comparing reward processing between diverse psychiatric disorders (Keren et al., 2018). Especially in light of the predominant role of depressive symptoms with regards to dysfunctional reward processing, it is vital to consider comorbidities (e.g. Ait Oumeziane & Foti, 2016). Moreover, there is limited knowledge about the temporal dynamics of reward-related processing and its impact on the development of psychiatric symptoms (Nielson et al., 2021). The majority of studies examined neural correlates during behavioral tasks, but self-report, which is a substantial tool in psychotherapy praxis (Lutz, 2002), is less well researched. This study: In this study, we will investigate reward processing and psychopathology via self-report in an online survey. We will conduct a cross-lagged-panel-design with three time points (each four weeks apart). The study aims to examine whether reward processing can predict the extent of depressiveness, social anxiety, eating disorder psychopathology, and alcohol consumption at a later point in time (T2 and T3). In addition, we will investigate whether depressiveness mediates the relationship between reward processing and social anxiety, eating disorder psychopathology, and alcohol consumption. |
