To help employees function effectively in job situations, a(n) __________ psychologist designs products that are safe, effective, and easy to use.

A human-factors psychologist studies how people interact with tools, products, and systems, then uses that knowledge to make them safer, more effective, and easier to use. This fits the question’s focus on product design; industrial/organizational psychologists more often focus on workplace topics such as hiring, training, and employee performance.

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