In a famous study from the late 1920s, the Western Electric Company wanted to study the effect of lighting on productivity in a factory. The factory workers were aware the study was in progress. The researchers discovered that worker productivity increased with each change of lighting, whether the lighting increased or decreased. What's the most likely reason this phenomenon occurred?
A. lack of randomization
B. absence of a control group
C. the subjects knew they were being studied
D. sampling variability overpowered other kinds of variability
E. voluntary response bias and undercoverag

Question

In a famous study from the late 1920s, the Western Electric Company wanted to study the effect of lighting on productivity in a factory. The factory workers were aware the study was in progress. The researchers discovered that worker productivity increased with each change of lighting, whether the lighting increased or decreased. What's the most likely reason this phenomenon occurred?
A. lack of randomization
B. absence of a control group
C. the subjects knew they were being studied
D. sampling variability overpowered other kinds of variability 
E. voluntary response bias and undercoverag

jazilove · Answer

I'm not 100% sure but I think it might be E. voluntary response bias and undercoverag