A cognitive test is a standardized assessment tool used to measure various mental processes such as memory, attention, perception, reasoning, and language. These tests are designed to evaluate a person's cognitive abilities and identify any deficits or impairments in cognitive functioning.

Cognitive tests can be administered in a variety of settings, such as clinical settings, schools, and research laboratories. They are often used to diagnose and monitor cognitive decline in neurological conditions such as Alzheimer's disease, Parkinson's disease, or stroke. They can also be used to assess cognitive functioning in healthy individuals or in individuals with psychiatric conditions such as depression or schizophrenia.

Examples of cognitive tests include the Mini-Mental State Examination (MMSE), Montreal Cognitive Assessment (MoCA), and the Wechsler Adult Intelligence Scale (WAIS). These tests typically involve tasks such as memory recall, attention tasks, visual-spatial skills, and language tasks.