How did the industrial. revolution lead to the need for reform

During the early stage of industrial revolution, we still haven't been introduced to the concept of minimum wage, requirement age, tax evasive techniques, consumer safety, etc.

Because of this, many workers were treated unfairly, many children were exploited, and many consumers' life were endangered.

Many people started to be really concerned about this, and This cause the need of a reform in order to regulated business practices in western countries.

this null effect is caused by a weak manipulation and ineffective internal validity. in a scientific study, as the one dr. morimoto is trying to perfom, internal validity refers to the confidence placed in the cause-effect relationship and to how well an experiment is done and able to eliminate confounding variables.        

can you explain it better