2. A specialist in post-traumatic stress disorder constructed a model for predicting the likelihood that someone will develop psychological disturbances in response to extreme trauma. His original model was based on a study of survivors of war-related incidents in Bosnia. He wondered if his model would also be a good predictor in other cultures, so he tested it in a similar population in Rwanda. What function was served by taking a cross-cultural approach? Explain. 3. A social psychologist was studying the impact of exposure to television on children's beliefs about the value of material goods. In her own culture, only wealthy families own televisions, causing difficulty in separating the effects of TV viewing from growing up in a wealthy family. She decided to conduct her research in the U.S. where she could find children with different levels of exposure to TV at both high and low income levels. What function was served by taking a cross-cultural approach? Explain. 4. A clinical psychologist was interested in the impact of racial oppression on self-concept. Because changes in racial oppression were much more subtle in his own culture, he decided to conduct a study in South Africa in which he compared pre- and post-Apartheid indices of self-esteem among school children. What function was served by taking a cross-cultural approach? Explain.