Behaviorist psychologists study human behavior and how the brain/ what parts of the brain make you do what you do. Humanistic psychologists focus on being the best version of one self. So yes, they do believe in free will.
The U.S. population is aging. Today, there are more than 46 million older adults age 65 and older living in the U.S.; by 2050, that number is expected to grow to almost 90 million.
