Which of the following roles typically requires only a high school diploma without specific training?

The role of a life coach typically requires only a high school diploma and does not mandate specific formal training or certification. Life coaches focus on helping individuals set and achieve personal goals, improve various aspects of their lives, and enhance personal and professional development. While many successful life coaches pursue additional training or certifications to enhance their skills and credibility, it is not a requirement to enter the field.

In contrast, the other roles listed usually necessitate advanced education and specific qualifications. For instance, psychiatric nurse practitioners must complete a master's or doctoral degree in nursing and hold specific certifications. Licensed marriage and family therapists require a master's degree in marriage and family therapy or a related field along with supervised clinical experience. Psychologists typically hold a doctoral degree in psychology and undergo extensive training to practice effectively in their field.