Weakness of cultural bias?

-Whilst it is important to consider cultural bias in research, shouldn't be assumed that there is no such thing as a universal behaviour -Research suggest that basic facial expressions for emotions are the same all over the human and animal world -Even though Ainsworth's strange situation and attachment types can be crituiqed for imposed etic, research has shown that some features of attachemtn (imitation and interactional syncrhony) are universal -Understand human behaiovur more fully, we have to appreciate behaviour unique to specific cultures (cultrually relative) and universal behaviour together.