Which of the following is an example of a stimulus in rené descartes’s reflex arc?
a. a person being tapped on the shoulder
b. spirits flowing from the shoulder to the brain
c. spirits being reflected back from the brain to the muscles
d. a person turning around to see who has tapped him on the shoulder

a. a person being tapped on the shoulder

Explanation:

Rene Descartes developed two ideas in the field of psychology. The reflex arc and mind-body interaction. Descartes argues that there are certain physical functions which are not influenced by the mind. The mind does not have control over certain actions. This approach helped the scientists to understand and research on the relation of the physical body and the mind.

answer; i believe the correct answer is (4) flip a coin as each participant arrives,heads indicates assignment to the first group: tails indicates assignment to the second group;