Final answer:
An Industrial-organizational psychologist specializes in workplace issues such as employee assessment, productivity enhancement, and planning assistance for staff and management.
Step-by-step explanation:
The type of psychologist who deals with workplace issues such as assessing potential employees, improving productivity, or helping staff and management with planning is an Industrial-organizational psychologist. These psychologists study the behavior of employees within organizations and find ways to improve the work environment and enhance performance. Industrial psychology focuses on selecting and evaluating employees, job analysis, and adherence to hiring laws. Organizational psychology is concerned with the social dynamics within the workplace, affecting employee satisfaction and productivity. Human factors psychology, also known as ergonomics, deals with the design of tools and workspaces that optimize safety, health, and productivity.