Another explanation can come from a socio-cultural point of view. It’s possible that Jessica has grown up in a very poor or low class neighborhood where many of the people didn’t attend college or they don’t have very good jobs. This could result in her being influenced by how the others in her neighborhood act. If none of her neighbors or peers are going to attend she thinks it is acceptable to not go to college either and just become a hairdresser which would take far less time and effort. You can also see the influence of her environment by the low grades and high test scores because she doesn’t think low grades are unacceptable so she doesn’t out much effort towards achieving good grades but she performs well on her test.
Lastly the behavioral perspective can give a solid explanation to Jessica’s behavior. When Jessica received low grades she did not get punished for them even though from her test scores her parents and teachers could tell she was capable of doing