Figure %: Example of Food Frequency Questionnaire

Video and Photographic Methods

Newer methods of dietary assessment include the use of videotaping or photographing foods that are eaten. The photographing can be done either by the individual wwhose data is being collected, or by the study team. Videotaping can be quite accurate if the camera remains at a standardized distance from the food and at a specific angle. This method would not be feasible for large surveys. Having individuals photograph their own food can result in pictures in which portion sizes may be difficult to ascertain, or foods difficult to identify. However, standardized photographs of foods of known weight and volume can be used as standards by which to estimate portion sizes.