Subjective cognitive decline

A self-perceived decline in cognitive abilities, particularly memory, that is not detectable on standard cognitive tests. Individuals with subjective cognitive decline notice changes in their thinking abilities but perform normally on clinical assessments. Research suggests SCD may represent the earliest symptomatic stage of Alzheimer's disease in some individuals, potentially preceding mild cognitive impairment (MCI) by several years. For technology design, people with SCD may benefit from early adoption of assistive features and accommodations as they adjust to subtle changes in their cognitive processing.