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.
In Olympic-style amateur boxing the weight divisions for men are: 1  light flyweight, not more than 108 pounds (49 kg) 2  flyweight, 115 pounds (52 kg) 3  bantamweight, 123 pounds (56 kg)  lightweight, 132 pounds (60 1  kg) light welterweight, 141 pounds (64 2  kg) welterweight, 152 pounds (69  kg) middleweight, 165 pounds (75 kg)