In their study of the contact hypothesis among Canadian ethnic groups, Kalin and Berry (1982) found that greater contact led to more positive attitudes toward different ethnic groups. What is one potential threat to the internal validity of their study?

Question

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Each option represents a potential threat to the internal validity of the study. A) suggests a selection bias, B) indicates a potential for shared environmental or cultural factors influencing attitudes, and C) highlights the issue of assuming causality from correlation.

In Their Study of the Contact Hypothesis Among Canadian Ethnic