During this time, he assisted in developing a test battery to help choose affective Army Air Force recruits.
He contributed his own original work in psychophysiology when he published Studies of Autonomic Balance in Army Air Forces Personnel in 1948.
Neither of these factors were reasonably measured to an adequate level before it was put on hold due to World War II escalating; however, researchers saw a great deal of promise and potential in future tests.
After the war concluded, psychologists working for the Army Air Forces (Wenger included) reexamined the study that was done at the Fels Research Institute.
Instructors also understood that a pilot needs to have stable emotions and immense concentration especially when maneuvering in a dangerous environment such as a warzone.
[3] He used a number of uncontrolled variables that pilots might see while in a war scenario such as “humidity, barometric pressure, temperature, and time of day” to see their effects on muscle tension and autonomic balance.
Wenger took the initiative to persuade his fellow staff to sign the oath, especially students that needed state funding in order to allow them to stay at the university.
In protest of the forced oath of loyalty, Wenger stepped down from his position as chair of psychology; hence, showing his dedication to the scientific community.