He is also covering eight topics as part of the additional higher level material (AHL).The Evolution and Neurobiology and Behavior options are to be completed with extensions for higher level only.

• 他的研究课题同时也覆盖了其他八个高科技领域，其中的进化论学，神经生物学和行为选择学是只有在高水平领域里才会被研究的。