When we examine cognition according to Piaget theory on
concrete operational stage, we can assume that biological,
environmental, and cultural factors plays an important role to how
thought processes and information is received and then processed.
African children in their own language, (according to the Berry’s test)
were able to give abstract answers to questions using their own
learning style. Why? Because the questions was given to them in their
own language which they can correlate with something that is familiar
from their own environment