From the 1920s to the 1950s, behavioral psychology dominated much of psychological thought, but the cognitive revolution of the 1950s revealed cracks in the theories of the radical behaviorists, and cognitive psychology eventually managed to gain the upper hand.
Top 10 Heavyweight Contenders. 1  Deontay Wilder â Wilder jumped to the number 1 contender position following his step up win against Bermane Stiverne. 2  While it cost him his all-KO streak, proving he could win a fight over the 12-round distance after never going past 4 rounds was an even bigger statement.
Robert Whittaker (fighter) Robert John Whittaker (born 20 December 1990) is a New Zealand-born Australian professional mixed martial artist of MÄori heritage currently competing in the middleweight division of the Ultimate Fighting Championship.