Yes, a therapist can use the title "doctor" if they hold a doctoral degree in psychology or a related field. In many countries, individuals who have earned a Doctor of Psychology (PsyD) or a Doctor of Philosophy in Psychology (Ph.D.) are allowed to use the title "doctor" professionally.
It's important to note that not all therapists are doctors. There are various mental health professionals with different levels of education and training, such as licensed psychologists, licensed clinical social workers (LCSWs), licensed professional counselors (LPCs), and licensed marriage and family therapists (LMFTs), among others.
Each profession has specific licensing and certification requirements, and the title "doctor" is generally reserved for those who have completed a doctoral-level program in psychology or a related field. However, even if a therapist doesn't hold a doctoral degree, they can still be highly qualified and effective in providing therapy services.
If you're unsure about your therapist's credentials or qualifications, don't hesitate to ask them about their educational background and professional experience. A reputable therapist will be transparent and happy to share this information with you.