High functioning, yet high suffering - the need to incorporate invisible struggles in adult ADHD diagnostic assessment/criteria.

Current DSM-5 diagnostic criteria for adult Attention-Deficit/Hyperactivity Disorder (ADHD) rely predominantly on externally observable signs and measurable functional impairment. While prior literature has criticized the child-centric and male-centric biases embedded in this framework, less attention has been given to its sign-centric and impairment-centric orientation. In this perspective article, we argue that this emphasis creates a critical diagnostic blind spot: adults who maintain high academic, occupational, or social performance through compensatory strategies and masking, yet experience substantial internal suffering. For these individuals, impairment is not absent but concealed beneath sustained effort, perfectionistic overcompensation, and chronic self-monitoring. The resulting psychological burden, emotional exhaustion, anxiety, shame, cognitive fatigue, and diminished quality of life often remain invisible within behavior-based diagnostic systems. We contend that current criteria capture the end-products of ADHD (observable behaviors and overt dysfunction) while neglecting the upstream processes shaping lived experience. Phenomena such as mind-wandering, internal restlessness, time blindness, sensory over-responsivity, and effortful self-regulation are clinically meaningful yet insufficiently represented in formal criteria. Moreover, compensatory mechanisms and masking, despite their relevance to clinical presentation and diagnostic accuracy, are not systematically assessed. We propose a process-based expansion of adult ADHD assessment that incorporates subjective cognitive phenomena, explicit evaluation of masking and compensatory strategies, and recognition of subjective distress and effort-to-output imbalance as diagnostically relevant dimensions. Such a paradigm shift would enhance diagnostic sensitivity, reduce misdiagnosis and underrecognition - particularly among high-functioning adults and women - and promote more equitable access to appropriate care. Recognizing invisible struggles is essential to capturing the full heterogeneity and lived reality of adult ADHD.