The WPI is often credited as the first personality test. It was designed by Robert Woodworth for the United States Army during World War I to identify solders at risk for shell shock. It measures "psychoneuroticism" which was a commonly used concept at the time, describing overall mental frailty. The test was not completed in time to be used for the war effort, but found a home in psychological research.

The test has 112 yes/no questions. Many questions are very dated, clarifying information has been provided for some in brackets. It takes most people around 10 minutes to complete.

This test is provided for educational and entertainment use only. It should not be used as psychological advice of any kind and comes without any guarantee of accuracy or fitness for any particular purpose. Also, your responses may be recorded and anonymously used for research or otherwise distributed.