Final answer:
Organizational psychology, a subfield of Psychology, has crucially contributed to organizational behaviour, particularly in areas like team dynamics, organizational power, and socialization.
Step-by-step explanation:
The discipline that has provided organizational behaviour with much of its theoretical foundation for team dynamics, organizational power, and organizational socialization is Psychology, specifically the subfield known as organizational psychology. This branch of psychology is dedicated to understanding how social interactions within the workplace affect individual employees and the overall functioning of the organization. It studies various aspects, including job satisfaction, management styles, leadership, organizational culture, and teamwork. Insights derived from organizational psychology have been significant in shaping practices within the workplace, such as improving job satisfaction through better understanding of what motivates employees, as well as designing effective management and leadership strategies that have direct implications for organizational power dynamics.