Hawthorne Studies Experiments - 4 Parts, Conclusions, Criticism

The Human Relations Movement began with the Hawthorne Experiments. They were conducted at Western Electrical Works in USA, b/w 1924-1932.
Four Parts of Hawthorne Studies / Experiments
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Part I - Illumination Experiments (1924-27)These experiments were performed to find out the effect of different levels of illumination (lighting) on productivity of labour.