ENVIRONMENTAL INFLUENCES ON INTAKE IN PRE-SCHOOL AGED CHILDREN

这个子项目是利用由NIH/NCRR资助的中心拨款提供的资源的许多研究子项目之一。子项目和调查员(PI)可能从另一个NIH来源获得了主要资金，因此可能会出现在其他CRISE条目中。列出的机构是针对中心的，而不一定是针对调查员的机构。儿童超重的流行凸显了确定环境因素的必要性。市场对过量和不断增长的比例大小的趋势加剧了人们的担忧，即大部分比例可能通过促进过量摄入而直接导致这一问题。关于分量大小对儿童进食影响的实证调查有限。两项研究已经证明了大份食物可以刺激进餐时的能量摄入。然而，这种影响的范围和性质仍不清楚。这项拟议的研究涉及一系列四个分量的实验，将在学龄前儿童中进行。前三个实验将通过确定：份量大小对儿童食用含糖饮料的影响，份量大小对儿童水果和蔬菜(FV)摄入量的影响，以及份量大小和能量密度对儿童能量消耗的综合影响来评估份量影响的范围。为了解决这个问题，第四个实验将评估食物份量和盘子大小对进食持续时间、咀嚼大小和咀嚼频率的影响。这一基本行为调查的结果可用于设计长期研究比例对儿童能量消耗和体重的影响。此外，这些基本研究成果还可以用来开发旨在改变幼儿环境潜在的顺从方面的干预措施。

This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. The subproject and investigator (PI) may have received primary funding from another NIH source, and thus could be represented in other CRISP entries. The institution listed is for the Center, which is not necessarily the institution for the investigator. The epidemic of overweight among children underscores the need to identify contributing environmental factors. marketplace trends for excessive and growing protion sizes have reinforced concerns that large portions may directly contribute to this problem by promoting excessive intake. Empirical investigation of portion size effects on children's eating are limited. Two studies have demonstrated effects of large portions to stimulate energy intake at meals. The scope and nature of such effects, however, remains unclear. The proposed research involves a series of four portion size experiments to be conducted with pre-school aged children. The first three experiments will evaluate the scope of portion size effects by determining: the effect of portion size on children's consumption of sweetened beverages, the effect of portion size on children's fruit and vegetable (FV) intake, and the combined effects of portion size and energy density on children's energy consumption. In an effort to address mechanism, the fourth experiment will evauate the effects of portion size and plate size on eating duration, bite size, and bite frequency. The results of this basic behavioral investigation may be used to infrom the design of long-term studies on the effects of protion size on children's energy consumption and weight. Further, these basic research findings may also be used to develop interventions aimed at modifying potentially obesigenic aspects of young children's environments.