This document explores the relationship between cognitive decline and performance on the Psychomotor Vigilance Task (PVT), a test of sustained attention. Cognitive decline, encompassing age-related memory impairment and more serious conditions, is examined, along with factors influencing its variability. The PVT's use in assessing cognitive function is detailed, including its sensitivity to sleep quality, age, and lifestyle. The document then investigates how these factors impact PVT performance and explores interventions, such as lifestyle modifications, CBT, and medication, to manage cognitive decline and ADHD. Finally, the importance of individualized treatment plans and progress tracking is emphasized.