I’ve taken a few personality tests. One was on how I negotiate and I thought the results didn’t really reflect how I go through that process. But everyone else thought the test had totally pegged me. When I took the Myers-Briggs Type Indicator it pretty much nailed my personality.

I thought about these tests when I read a discussion on www.wsj.com on the percentage of companies that use some sort of tests during the hiring process. Nearly 20 percent of employers use personality tests in the hiring or promotion process, according to a survey done in 2011 by the Society for Human Resource Management of 495 human resource managers.

When you get to hiring for and promoting into top positions, the amount of testing and assessments of candidates understandably goes way up. According to an article in the Wall Street Journal, “Employers Put Executive Job Candidates to the Test,” 72 percent of the 516 companies polled used assessments to make decisions on promoting executives, more than double three years ago.

These assessments can include psychological interviews, role-playing and simulations. For example, candidates may be told to pretend they are dealing with a frustrated customer who starts yelling at them.

Not surprisingly, Google has identified the qualities and skills it desires in people who fill their top positions and has created an algorithm to predict each candidate’s success.

While I do think these tests have some validity, I believe they should be treated as just one indicator of whether a person can handle a high-level position. Testing should be just part of the process.

A key part of the process for me is just spending time with the person and getting to know him or her. After being in the turnaround business for more than 30 years, I’ve done a lot of hiring and firing. Luckily, one of the skills I’ve developed along the way is the ability to read people, a skill that is useful in just about every area of life.

It’s a skill that the legendary coach Bear Bryant had, according to people who worked with him. Bruce Arians, the Cardinals head coach, was his assistant for two years and called him “a master of personnel, of people.” It’s undoubtedly one of the skills that helped him win 323 games as coach of the University of Alabama football team.

(I also adhere to one of his hiring policies. “I don’t hire anybody not brighter than I am,” he said. “If they’re not smarter than me, I don’t need them.”)

If you want to improve your ability to read people and learn more about them than what they are telling you, here are a few questions to ask from an article by Anthony K. Tjan on the Harvard Business Review blog, “Becoming a Better Judge of People.”

• How does this person treat someone he doesn’t know? If you meet in an office, how did he treat the receptionist? If you go out to a meal, is she polite to the waiter?

• Does the person feel authentic? Did your BS detector go off at any time? Are they trying too hard?

• Is this person an energy-giver or taker? We’ve all known people that give off a negative energy. Does this person have a positive view of the word or tend to react negatively?

And one of the most important questions to consider: Is this person self-aware? A good understanding of your strengths and weaknesses is key to being a good leader.

Testing candidates can tell you a lot about their qualities, skills and values. But spending time with them and observing how they behave can tell you even more.