Jessica Cox suffered a rare birth defect and was born without any arms. None of the prenatal tests her mother took showed there was anything wrong with her. Not only she was born with this rare congenital disease but also with a great spirit. The psychology graduate can write, type, drive a car, brush her hair and talk on her phone simply using her feet. Ms. Cox, from Tuscon, Arizona, USA, is also a former dancer and double black belt in Tai Kwon-Do. She has no-restrictions driving license, she flies planes and types 25 word a minute. The plane she is flying is called an Ercoupe and it is one of the few airplanes to be made and certified pedals. Without rudder pedals Jessica is free to use her feet as hands. She took three years instead of the unusual six months to complete her lightweight aircraft license, had three flying instructors and practiced 89 hours of flying becoming the first pilot with no arms. What subject did Jessica Cox study formally?

          Jessica Cox suffered a rare birth defect and was born without any arms. None of the prenatal tests her mother took showed there was anything wrong with her. Not only she was born with this rare congenital disease but also with a great spirit.
          The psychology graduate can write, type, drive a car, brush her hair and talk on her phone simply using her feet. Ms. Cox, from Tuscon, Arizona, USA, is also a former dancer and double black belt in Tai Kwon-Do. She has no-restrictions driving license, she flies planes and types 25 word a minute.
          The plane she is flying is called an Ercoupe and it is one of the few airplanes to be made and certified pedals. Without rudder pedals Jessica is free to use her feet as hands. She took three years instead of the unusual six months to complete her lightweight aircraft license, had three flying instructors and practiced 89 hours of flying becoming the first pilot with no arms.

What subject did Jessica Cox study formally?