Final answer:
Hugo Munsterbergis considered the pioneer of industrial psychology, contributing significantly to the field through his work on employee selection, training, and advertising in the early 20th century.
Step-by-step explanation:
The pioneer in the field of industrial psychology, which is the scientific study of people at work, is Hugo Münsterberg. In 1913, he published Psychology and Industrial Efficiency, a seminal work covering topics crucial to industrial psychology such as employee selection, training, and effective advertising. Munsterberg, along with other early contributors such as James Cattell and Walter Dill Scott, laid the groundwork for the application of psychological principles to business and industrial settings, making an indelible impact on the field.