A researcher doing a cross-cultural comparison of infant behaviors reports that infants in her own ...

A researcher doing a cross-cultural comparison of infant behaviors reports that infants in her own culture acquire certain cognitive skills before infants from a different culture. Which one of the following is NOT a research-supported explanation for these reported findings?

▸ Genetically derived differences exist in how cognition is expressed across cultures.

▸ There may be cultural and linguistic differences between the researcher and infant subjects in the other culture.

▸ The researcher may be testing cognitive skills with objects that are less familiar or interesting to the infants in the other culture.

▸ The researcher may be testing skills that are less relevant for infants in the other culture.