Need for cognitive closure refers to the need to reach a precise knowledge instead of confusion and ambiguity on a subject and the desire to make a decision as soon as possible. The purpose of the present research is to adapt the "15-item version of the Need for Closure Scale" developed by Roets and Van Hiel to Turkish and testing the relationships between thinking and decision-making styles and the need for cognitive closure through the adapted scale. The work group consists of 577 people who voluntarily participated. Confirmatory factor analysis was used to test the validity of the scale. Cronbach's alpha reliability coefficient was calculated to test the reliability of scale scores. The research also utilized Thinking Styles Inventory developed by Sternberg and Wagner and Decision Making Styles scale developed by Scott and Bruce. According to the findings of the research, need for Cognitive Closure Scale is a valid and reliable instrument that can be used to study the attitudes towards cognitive closure in Turkey. Additionally, cognitive closure and thinking and decision-making styles are related; the need for cognitive closure can also be regarded as an approach to thinking and decision-making.