Which psychologist is most directly concerned with suggesting ways to improve worker productivity in a computer factory? clinical psychologist personality psychologist industrial-organizational psychologist psychiatrist?

L believe the answer is: industrial-organizational psychologist

industrial-organizational psychologist would utilize the knowledge that he/she learn in psychology filed to improve the quality of workplace environemnt.

Things such as how to improve worker's productivity, how to improve the harmony among team members, and how to create proper chain of commands are usually handled by industrial-organizational psychologist