research worker
researcher ****
investigator ***

They can go into more detail than a human research worker ever could.

Evaluation has been described in many different ways by educational research workers.

Such tasks are undertaken by research workers in many fields of industry.

Unlike many research workers, he was very liberal in giving credit for any work done by his colleagues.

Very careful training of all the research workers is needed to avoid the various pitfalls.

The professional background is provided by a wide range of teachers and research workers affiliated with the University.

In 1925, his first book was published: Statistical methods for research workers.

At this stage, then, the general position has been stated as to how research workers should approach their task.

First, research workers must be absolutely sure they know what the statistics are about.

So, the research worker should know something about the main ways to obtain information from the library.