In a 1927-32 western electric company study on the effect of lighting on worker productivity, productivity increased with each increase in lighting but then also increased with every decrease in lighting. if it is assumed that the workers knew a study was in progress, this is an example of(a) the effect of the treatment unit(b) the placebo effect(c) the control group effect(d) sampling error(e) voluntary response bias
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In a 1927-32 western electric company study on the effect of lighting on worker productivity, produc...
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