Across-cultural study compared all 300 residents of a remote african village to 300 volunteers from chicago. what is the main weakness in this research? ​

Answer

The types of samples are not comparable

Explanation

Across cultural study is a specialization in anthropology  that uses data that is collected in the field from many societies which is done for the purposes of examining the scope of human behavior and the test hypotheses about human behavior and mental processes which include both their variability and invariance  that is under cultural conditions. So in this case where cross-cultural study compared all 300 residents of a remote African village to 300 volunteers from Chicago. The types of samples are not comparable this is because comparative  was between different fraternities .

i would say b. research typically uses a variety of sources