Interactive Web-Based Computerized Food Portion Tutorial

描述(申请人提供)：这一第二阶段项目的主要目的是进一步开发和评估基于计算机的食物部分教程，以改进对各种食物类型中的食物部分的估计。该项目的具体目标是根据营养学家和最终用户的反馈，对第一阶段开发的计算机化食物部分教程(CFPT)进行改造，扩大图片数据库，将分量大小与营养信息结合起来，提供为最终用户量身定做的饮食数据，将CFPT图片数据库与有效的食物频率问卷联系起来，开发图片式食物频率问卷(PFFQ)模块，并将CFPT以光盘形式提供，以便于更多人使用。将与饮食专业人员一起对计算机化的食物部分教程和画报食物频率问卷进行可用性评估，以确保节目内容和设计的准确性和适当性。最终完成的教程模块将在疗效试验中进行评估，以确定接触该教程是否通过提高食物分量估计的准确性来帮助用户。还将进行图片食物频率问卷(PFFQ)部分的有效性试验，将PFFQ与标准食物频率问卷、4天食物记录和多次24小时召回进行比较。根据结果以及终端用户和营养学家的反馈，将为第三阶段的商业产品制定拟议的修改。

DESCRIPTION (provided by applicant): The primary purpose of this Phase II project is to further develop and evaluate a computer-based Food Portion Tutorial to improve food portion estimation among a variety of food types. Specific aims of the project are to revamp the Computerized Food Portion Tutorial (CFPT) developed in Phase I as per feedback from nutritionists and end-users, expand the database of pictures, integrate portion sizes with nutritional information and provide dietary data tailored to the end-user, link the database of CFPT pictures with a validated food frequency questionnaire to develop a Pictorial Food Frequency Questionnaire (PFFQ) module, and offer the CFPT in a CD-rom version for expanded accessibility. Usability evaluations of both the Computerized Food Portion Tutorial and the Pictorial Food Frequency Questionnaire with dietary professionals will be conducted to ensure accuracy and appropriateness of program content and design. The finalized tutorial module will be evaluated in an efficacy trial to determine whether exposure to the tutorial assists users by improving food portion estimation accuracy. A validity trial of the Pictorial Food Frequency Questionnaire (PFFQ) component will also be conducted, comparing the PFFQ with a standard food frequency questionnaire, a 4-day food record, and multiple 24-hour recalls. Based on results as well as feedback from both end users and nutritionists, proposed modifications will be developed for a Phase III commercial product.