Markus has also completed research on differences between East-Asian and European-American cultural norms, as well as biological differences that occur from different cultural perspectives and practices.
Markus on uurinud ka Ida-Aasia ja Euroopa-Ameerika kultuurinormide erinevuseid ning bioloogilisi erinevuseid, mis tulenevad erinevatest kultuuriperspektiividest ja praktikatest.