Myers-Briggs personality test. There are free versions available online. 

• What are personality tests used for? 
• What is the Myers-Briggs personality test? How does it measure personality?
• According to your results, what is your MBTI personality type? Do you agree with your results? Why or why not? 
• Can you predict the MBTI personality type of a friend or relative? How would knowing their personality type affect your relationship or the way you would interact with them?
• How will the information obtained from this test be beneficial within the workplace? How could the Myers-Briggs test help add value to workplace communications and interactions?