respond to someone who said: To become certified in the California Psychological Inventory, you can take a three-day certification course (with 6 hours of pre-work) for $2395 from the Myers-Briggs Company (Myers-Briggs Company, 2024). The cost and time commitment definitely impact my ability to use this tool with clients. I liked the MBTI and am considering getting certified in that. However, I cannot get certified in every $2000 test, both financially and timewise. Therefore, I would probably get certification in one test, and then, as my client base grows, I could expand the number of tests I offer by getting certified in another, perhaps one more each year. The DISC is a similar tool that can also be used in the workplace like the CPI. Both measure dominance, which could be important for evaluating leadership. Whereas the CPI focuses on four different qualities, such as inner life vs. action initiator or rule breaker vs. rule follower, the DISC has four different qualities: dominance, influence, steadiness and conscientiousness. One way the CPI could be effective is in the case of someone wanting to move up in a company. By taking the assessment and becoming aware of their attitude toward rules, that