“…Compared to the general population, even higher numbers of depression and depressive symptoms are found in the population of adults with intellectual disabilities (Cooper, Smiley, Morrison, Williamson, & Allan, 2007; Hermans, Beekman, & Evenhuis, 2013). Despite the large number of adults with intellectual disabilities and depressive symptoms, treatment options, especially for those with severe intellectual disabilities, are scarce (Hamers, Festen, & Hermans, 2018). Some adults with mild or moderate intellectual disabilities and without major verbal limitations may benefit from psychological interventions, for example cognitive behavioural therapy (CBT) (Vereenooghe & Langdon, 2013), but a large part of adults with intellectual disabilities and depressive symptoms get pharmacological treatment or no treatment at all.…”