In key ways, writing surveys to assess foreign public opinion parallels how Pew Research Center approaches questionnaire design for U.S. projects. In both cases, Center staff carefully consider ...

Objective: To assess the validity of a semi-quantitative food-frequency questionnaire (SFFQ) used in a large nation-wide dietary survey among 12-month-old Norwegian infants. Methods: The SFFQ was ...

Questionnaires are widely used for data collection in health research and evaluation. Their design, use and analysis are key to accurate, comprehensive and complete data. This course is an ...

A French quality of life questionnaire specific to erectile dysfunction (ED), ‘QVS’ for ‘Questionnaire de Vie Sexuelle’, has been developed. This paper describes its validation: item reduction and ...