Questionnaire recoding is the process of transforming and restructuring data collected through a questionnaire in order to improve its accuracy and usefulness. This involves converting responses into a standardized format, correcting errors, and organizing the data in a way that allows for easier analysis and interpretation. By recoding a questionnaire, researchers can gain valuable insights and make more informed decisions based on the data collected. This method is commonly used in social science research and market research to ensure the reliability and validity of the data. Overall, questionnaire recoding is an essential step in the data collection process that helps to enhance the quality and effectiveness of research studies.