Hi,
My name is Bob Green and I am working on a master's thesis on human perception of differing facial proportions. I am looking for head shots of willing volunteers to use in my study. I am hoping to have about 6 female and 6 male models to start with. The type of image I need would be with the model looking straight at the camera with a neutral expression and even lighting (no harsh Karsh or dramatic effects 
The images I use will appear in their original state and be digitally manipulated to change face shape and feature proportions. The study will be conducted on the web.
If you provide an image, you are giving permission for the manipulations listed above and for me to post it to the web, as well as include it in my thesis and any scholarly papers/talks that might arise from this study.
Unfortunately I can offer no compensation other than the thanks of a grad student. Models will be included in the acknowledgement section of my thesis and if the site is SFW I can include a link at the conclusion of my study.
Please send photos or any questions you have to me at rogreen "at" iupui.edu
Thanks,
Bob