Final answer:
The subject of this question is Social Studies. The question asks about a famous research study called the Hawthorne studies, which examined the effects of physical and social factors on employee productivity.
Step-by-step explanation:
The subject of this question is Social Studies. The question asks about a famous research study conducted between 1927 and 1932 at a circle pool equipment manufacturing plant, which measured the influence of various variables on employee productivity. This study, known as the Hawthorne studies, marked the origin of organizational psychology and examined the effects of both physical and social factors on worker performance.