If you like, you can measure the daily growth of the bacteria colonies by using a felt-tip marker to trace a circle around each colony on the bottom of the petri dish. After several days, you should have a collection of concentric rings on the bottom of each dish.
Alfred Adler was a physician, psychotherapist, and the founder of Adlerian psychology, sometimes called individual psychology. He is considered the first community psychologist, because his work pioneered attention to community life, prevention, and population health.
But even here there is no consistency. For instance, the term counselor is most often used by Master's level practitioners. But in any listing of therapists you could find a doctorate level counselor, or a Master's level psychologist. could see a neurofeedback therapist or a behaviour therapist. One could have a B.A. in psychology with a certificate course, and the other a doctorate in psychology registered with a Board of Examiners. Only the letters after the name define which therapist is more qualified.