It will be assessed with the Montreal Cognitive Assessment. Accordingly, a score of 21 points and above is considered normal. Individuals who score 21 points or less on this test will be included in the executive function deficit group. The others will included in control group.

Sleep quality will be assessed with the Pittsburgh Sleep Quality Index. The scale consists of 18 questions and 7 components and was developed to assess sleep disturbances and sleep quality in the last 1 month. These components include subjective sleep quality, sleep latency, sleep duration, habitual sleep efficiency, sleep disturbance, sleep medication use and daytime dysfunction. For scoring, it is applied as 0 if it has never occurred during the last month, 1 if it occurs less than once a week, 2 if it occurs once or twice a week, and 3 if it occurs three or more times a week. The total score has a value between 0-21. If the total score obtained as a result of the questionnaire is above 5, sleep quality is clinically poor.

Quality of life, sleep quality and depression levels will be assessed. Quality of life will be assessed with the 12-item Short Health Scale. Short Health Scale consists of 8 sub-dimensions and 12 items including physical functioning (2 items), physical role (2 items), body pain (1 item), general health (1 item), energy (1 item), social functioning (1 item), emotional role (2 items) and mental health (2 items). Items related to physical and emotional role are answered as yes or no, while other items have Likert-type options ranging from 3 to 6. A higher score represents better health.

The timed up and go test is a functional dynamic balance test. The Timed Up and Go test is a timed measurement in which the individual has to get up from a chair, walk 3 meters, turn around, walk back and sit down. The Timed Up and Go is used to assess functional mobility and dynamic balance control in older people to identify increased risk of falls. Participants will be asked to wear the shoes they regularly wear to walk at a normal pace and will be allowed walking aids. The time between the participants getting up from the chair and sitting down again will be recorded in seconds.