Final answer:
The I/O psychologist who is most likely to travel to where there is demand for their services and is retained to help a company deal with a specific issue is a consulting industrial-organizational psychologist.
Step-by-step explanation:
A consulting industrial-organizational psychologist is the type of I/O psychologist who travels to where their services are needed to assist companies with specific issues, often pertaining to employee selection, performance appraisals, and organizational development. Consulting I/O psychologists apply their expertise in areas such as employee selection, performance appraisal, and organizational development to address various challenges within companies.
They often work with organizations on a project basis, dealing with changes like downsizing events, corporate mergers, or creating strategies to increase productivity and maintain employee morale. Their role is crucial in ensuring that the workforce remains effective and motivated despite the dynamic nature of modern business environments.