The 1970s saw an increase in confrontations between management and labor due to worker dissatisfaction with repetitive and narrowly defined jobs as well as work line speedups and confrontational discipline.

This statement is true. The 1970s saw a rise in labor protests and strikes as workers became increasingly dissatisfied with their working conditions, including repetitive and narrowly defined jobs, faster work line speeds, and strict disciplinary measures from management. This period is often referred to as the "labor wars" or the "blue-collar blues."