He worked for a year as a Harvard Travelling fellow at the General Electric Nela research lab.

He served as a member of committees of the National Research Council on vision and aviation psychology.

At Harvard, he gave advanced courses in psychology, and he followed up his 1926 book The Mystery of Mind with Fundamentals in Human Motivation in 1928.

It is meant as a method for correcting photometric measurements of luminance values impinging on the human eye by scaling them by the effective pupil size.

[5][6][7] [8] Troland took interest in psychical research and had carried out experiments in telepathy at Harvard University which were reported in 1917.