<P> Sociological work has explored the social alienation and boredom that many workers feel because of the repetition of doing the same specialized task all day long . </P> <P> One of capitalism's most famous critics, Karl Marx, expressed in his Entfremdung theory the belief that in order to achieve job satisfaction workers need to see themselves in the objects they have created, that products should be "mirrors in which workers see their reflected essential nature ." Marx viewed labour as a chance for us to externalize facets of our personality . Marxists argue that specialization makes it very difficult for any worker to feel they may be contributing to the real needs of humanity . The repetitive nature of specialized tasks causes, they say, a feeling of disconnection between what a worker does all day, who they really are, and what they would ideally be able to contribute to society . Marx also argued that specialised jobs are insecure, since the worker is expendable as soon as costs rise and technology can replace more expensive human labour . </P> <P> Since workers have to stand in the same place for hours and repeat the same motion hundreds of times per day repetitive stress injuries are a possible pathology of occupational safety . Industrial noise also proved dangerous . When it was not too high, workers were often prohibited from talking . Charles Piaget, a skilled worker at the LIP factory, recalled that beside being prohibited from speaking, the semi-skilled workers had only 25 centimeters in which to move . Industrial ergonomics later tried to minimize physical trauma . </P>

How did the introduction of the assembly line affect fords factory workers