Yes, you can choose to add a marketing minor to any major degree program, such as psychology. Depending on your career goals, this could make for an ideal combination for you. Principles of business are found in all organizations, and whether you’re looking to take your psychology studies to private practice or a larger corporation, learning marketing and business concepts can be valuable. If you’re considering joining the business world after you graduate in any sense, a minor in marketing can provide you with a solid understanding of major aspect of business.