http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B758G-4KV82NX-R&_user=145269&_rdoc=1&_fmt=&_orig=search&_sort=d&_docanchor=&view=c&_acct=C000012078&_version=1&_urlVersion=0&_userid=145269&md5=4d3768e2cf47a6e16937771712a6d554
This study examines the portions of foods that young adults (mean age 18, mostly college freshmen) take in a cafeteria-style setting. It found that the portions they chose were larger than in this same study found in 1984 because of outside influences, like larger packaging in grocery stores and increased restaurant servings people have become accustomed to.
In the quote below, I also found it interesting that hunger status rating did not influence the size of the portion.
"Analysis of variance results indicated no significant effect from factors that may have influenced the size of the portion (ie, hunger status rating, preference for the foods, intention to eat the foods, job experience as a food preparer or server, extent of experience with measuring cups and spoons, and year in college). In addition, t tests revealed no significant difference between the typical portion size selected and time of day."
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