On the nature of objective and perceived cognitive impairments in depressive symptoms and real-world functioning in young adults.

Cognitive impairments in depression contribute to disability. According to prevailing cognitive theories, one's perception related to cognitive ability can cause and maintain depression, and related outcomes. Here, we investigate the degree to which perceived cognitive impairment predicts functional impairment above and beyond objective neurocognition. A sample of young adults (n = 123) completed a battery of tests measuring objective cognitive ability, perceived cognitive function (e.g., Perceived Deficits Questionnaire), disability (e.g., World Health Organization Disability Assessment Schedule) and depressive symptoms (Beck Depression Inventory-2). Hierarchical multiple regression analyses tested the incremental variance that perceived cognitive impairment accounts for above and beyond neuropsychological test measures and disability related to depression. Results show that perceived cognitive impairment accounts for significant incremental variance in depressive symptoms beyond neuropsychological test scores; disability measures were significantly associated with depressive symptoms, as was perceived cognitive impairment. Individuals with depression and related disorders are more likely to report cognitive impairments and experience diminished cognitive ability - relative to healthy controls - regardless of objective impairments, highlighting the importance of considering, measuring, and treating this perceived cognitive impairment, that is, Cognitive Impairment Bias (Dhillon and Zakzanis, 2019).