60th Annual STS (2000–2001)
Finalists
Christina Rose Crabtree

PENNSYLVANIA
Christina Rose Crabtree, 17, of Chalfont, conducted four years of research on human pheromones-odorless chemical signals that affect social behavior-for her Intel Science Talent Search project in behavioral and social sciences. Christina extracted pheromones from the sweat of heterosexual and homosexual females. As a control she added "synthetic sweat" and presented combinations of the pheromones to 100 people from four subject categories, female and male heterosexuals and homosexuals, who sniffed each sample for three seconds. Christina's research suggests that heterosexual males and females prefer pheromones of heterosexual females, but homosexual females prefer pheromones of homosexual women. At Central Bucks High School - West in Doylestown, Christina serves on the student council, is a member of the environmental club and plays the clarinet. She teaches Spanish to kindergartners, exhibits hand-made batik clothing and works as a lifeguard. She has received numerous science awards in the field of behavioral science. The daughter of Dr. Loren Crabtree and Dr. Barbara Cram-Crabtree, Christina hopes to study neuroscience at Brown University and practice medicine in Latin America.