The aim of this thesis study is to determine the relationships between cognitive functions, job satisfaction and sleep in individuals aged 30 and over.Individuals over the age of 30 working in the Sasalı branch of TPI Composite factory will be included in the study that we plan to do as a cross-sectional study.

Data will be collected at TPI Composite Factory Sasalı Branch Infirmary. Individuals' demographic information (age, height, weight) and cognitive functions, job satisfaction and sleep quality will be evaluated.

By definition, cognition is collecting information from the environment; We can express this collected information as the ability to understand and interpret. cognitive functions; attention, short and long term memory, understanding, adaptation, language skills, decision making, abstract thinking, mathematical processing and executive functions.

executive functions; It is the ability of a person to plan purposeful action without any help, to interpret the information he has collected, and to always determine the next step in successive tasks.As the age progresses, the individual experiences problems in executive functions as a result of the change in the prefrontal region. Elderly individuals cannot concentrate and have problems solving problems. In addition, they show lower performance than young people in processing, using and strategizing. In other words, as the age progresses, it becomes more difficult to maintain attention in situations that require simultaneous processing and using several information.

This strain also affects the job satisfaction of individuals. The concept we call job satisfaction is a feeling that the employee experiences as a result of realizing that the work he does and the results of the work done coincide or allow them to overlap with his material and moral needs and personal value judgments.

The daily life activities of individuals whose job satisfaction is affected are also affected. In daily life activities, sleep is a physiological requirement for human beings. As a concept, sleep is a natural resting state in which the consciousness against external stimuli is completely or partially lost, the reaction power is weakened and all kinds of activities are greatly reduced.

Sleep needs differ according to age. Individuals experience sleep problems with advancing age. The depth of sleep decreases. The person wakes up at night and it becomes difficult to fall asleep again. The duration of night sleep decreases and the duration of sleep during the day increases.

When the literature is examined, there are many studies with young and middle-aged adults in studies on cognitive function.

Many studies have examined cognitive function and physical activity and sleep quality or physical activity and job satisfaction. No study evaluating the relationship between sleep quality and job satisfaction has been found in the literature.

In line with the studies in the literature, we thought that there would be a relationship between cognitive function, job satisfaction and sleep quality. Therefore, the aim of the study is to determine the relationships between cognitive functions, job satisfaction and sleep in individuals aged 30 and over.

Inclusion Criteria:

• Volunteering to participate in the study
• Individuals aged 30 and over
• Being able to read and write Turkish

Exclusion Criteria:

• Conditions where cognitive functions are affected, such as dementia
• Being colorblind
• Having problems with speaking and understanding Turkish

Employees in the 65.5 main mold divisions, who have been working in the factory over the age of 30 for more than 2 years, are included.