What is serial seven?

Serial sevens is a test of mental status used to evaluate an individual's cognitive function. The test involves asking the individual to subtract seven from a starting number, repeatedly, for a certain period of time. The individual's ability to accurately and quickly perform this task is used as an indicator of their cognitive function, particularly their working memory, attention, and processing speed. The serial seven test is commonly used in medical settings, especially in the assessment of cognitive function in older adults and individuals with neurological or psychiatric conditions. However, it is not considered a definitive measure of cognitive function and should be used in combination with other tests and evaluations.