Thank you for the opportunity to help you with your question!
a) self report; this the most effective way to ases the extent one is stressful. here individual give reports on their mental and physical state
b)biomedical; this is where we say that one effect of stress is ulcers hence a person who is affected by ulcers is likely to be under stress.
c) physiological;Physiological measures in stress provide indications of the level of sympathetic nervous arousal. This can include a person's heart rate, blood pressure, and respiration rate and so on. One of the common physiological methods used in measuring stres.
medicine and good health by doctor walter m jamestone. 1976
Please let me know if you need any clarification. I'm always happy to answer your questions.