“…Variables such as symptoms are often intertwined, and even though therapists try to intervene on, for example, mood, it is likely that other things (e.g., going out more) will change at the same time. This phenomenon is also known as the fat-handed intervention, as things (thoughts and mood) are so interconnected that it is dubious whether interventions on a single variable, for example, worrying, are possible without changing the rest of the system (for more on this, see Eronen, 2018). Instead, the network approach can be seen as an incentive to move more towards more complex theories and models, belonging to the field of complex system theory (van de Leemput et al, 2014;Van Der Maas et al, 2006;Van der Maas & Molenaar, 1992;Wichers, Groot, & Psychosystems, 2016).…”