John Broadus Watson was a famous American psychologist who lived between 1878 and 1958. He was born in Greenville, South Carolina to Pickens and Emma Watson and was the fourth of six children . The family was not well off financially and John did not have an easy childhood. Despite the poverty that engulfed the family, John's father became an alcoholic who cared less about his family. However, John's mother Emma was a devoted religious woman who struggled to care for her children with less support from her husband. In 1891, John's father left the family and disappeared after engaging in extramarital affairs with other women. The infidelity strained his marriage to Emma and the relationship with his children. After his father's disappearance, John became unruly and confused due to the lack of complete parental care from both his parents. He became defiant at school and would not listen to his teachers' advice. He bullied his peers and was involved in other anti-social behavior which was completely unacceptable in the school environment. Additionally, he became violent and even rebelled against his mother (Buckley, 1989). Watson's negative attitude toward education did not last forever and it changed after he was accepted to Furman University where he began his education at the age of sixteen in 1894. John's life began change thanks to his registration and the help of his teacher Gordon Moore. He later developed a positive attitude towards academic work as he realized that he could at least now contribute to the community, regardless of his family's social class. His academic results were quite brilliant and he received a master's degree from Furman University in 1899. He then enrolled in...... middle of article...... information is introduced even if the previous pattern of behavior has already been established through reinforcement (Cherry, 2011). In conclusion, behaviorism theory relies on observable behaviors to facilitate quantification and data collection. Effective techniques such as behavioral intervention and discrete trial training come from this school of thought. The approaches are essential for changing maladaptive behaviors in adults and children (Cherry, 2011). Today, conditioning and the use of reward and punishment are used to help people adopt accepted behavior and, in other cases, to help them stop problem behavior (Coon and Mitterer, 2008). This made behavior modification and training easy and possible. Therefore, Dr. John Watson played a considerable role in the transition of psychology from the works of early researchers to modern researchers..