Final answer:
Hugo Münsterberg is credited with giving the first significant momentum to psychological testing in the industry through his book 'Psychology and Industrial Efficiency'.
Step-by-step explanation:
The first great impetus to psychological testing in industry came from Hugo Münsterberg. He was a pioneer in applying psychology to various aspects of the business world, including employee selection, employee training, and advertising effectiveness. In 1913, he published ‘Psychology and Industrial Efficiency’, in which he discussed these topics extensively. As for the first psychologist to use psychology in advertising, that was Walter Dill Scott who was also significantly influential in the field of industrial psychology. It is important to highlight that although Sigmund Freud had a major impact on psychology, his work was mainly centered around psychoanalysis and not industrial psychology.