Old World and Levantine prehistory
The Lower and Middle Pleistocene
Paleoenvironments and paleoecology of the Great Rift Valley
Morphotechnpology and typology of lithic assemblages (reduction sequences and processes)
The Acheulian and Mousterian technocomplexes
Pleistocene hominin evolution and the evolution of behavioral patterns
Human dispersals/diffusions/migrations
Site formation processes