Final answer:
An increase in interracial contact has resulted in more positive attitudes between South African Whites and Blacks, as studies have demonstrated that cooperative efforts can significantly reduce prejudice.
Step-by-step explanation:
An increase in interracial contact has been followed by more positive attitudes between South African Whites and Blacks.
Studies such as the Robbers Cave experiment and the jigsaw classroom technique have shown that cooperative engagement and interaction among people of different races can reduce prejudice and lead to more positive intergroup relationships.
Working towards common goals and engaging in positive imagined social interactions are identified methods that decrease prejudicial attitudes and improve relations between different racial groups.