Depression can affect cognitive function, including memory, attention, and the processing of information, but it does not necessarily affect intelligence. Intelligence is a complex and multidimensional construct that encompasses a wide range of cognitive abilities and skills, such as reasoning, problem-solving, and verbal ability. While depression can impair cognitive function and affect the ability to think clearly and make decisions, it does not  cause a decline in intelligence. In fact, with proper treatment and support, many individuals with depression can improve their cognitive function and regain their ability to perform at their best. However, untreated or poorly managed depression can lead to ongoing cognitive impairment, which can interfere with daily activities and overall quality of life. If you’re struggling with depression,  seek help from a mental health professional who can diagnose and treat your condition and help you regain your cognitive function.