Back-translation is a method used in the field of translation studies to evaluate the quality of a translation. It involves translating a text from one language to another, and then translating it back to the original language to see if any discrepancies or inaccuracies arise. This technique is commonly used in cross-cultural research to ensure the accuracy and reliability of translated materials. By comparing the original text to the back-translated version, researchers can identify any errors or cultural nuances that may have been lost in translation. This method helps to improve the accuracy and effectiveness of translated materials, particularly in areas such as medicine, psychology, and social sciences.