Recall that victor cline and his colleagues (1973) measured the physiological arousal of heavy tv viewers and light tv viewers when the came into the lab to watch a violent boxing match. results of their study reveal that

Ghana, first of the great medieval trading empires of western africa (fl. 7th–13th century). it was situated between the sahara and the headwaters of the sénégal and niger rivers, in an area that now comprises southeastern mauritania and part of mali.