Which term reflects a concentrated effort by some managers and supervisors to become more sensitive to the needs of employers or treat them in a more kind and humanistic manner?

Human Relations Movement.

Explanation:

Human Relations Movement is a term which reflects a concentrated effort by some managers and supervisors to become more sensitive to the needs of employers or treat them in a more kind and humanistic manner.

Human Relations Movement was founded around the 1930s by Dr. Elton Mayo and sociologist Fritz Roethlisberger based on series of experiment called the Hawthorne Studies.

The Hawthorne Studies was a study that centered around the employees that were working at the Hawthorne plant of the Western Electric Company and it was conducted in the 1920s by Elton Mayo and Fritz Roethlisberger.

Basically, the study was focused on examining the socio-psychological aspects of human behavior (employees) working in a business firm or an organization.

The main purpose of the Hawthorne Studies was to analyze, examine and determine how various aspects of the work environment in an organization which typically includes social factors such as break time, lighting, and duration of work hours have on the level of productivity (performance) of employees.