Who is most frequently credited with turning Darwin’s observations into a measurable science?
Answer
Paul Ekman.
Paul Ekman is credited with empirically testing the universality hypothesis and developing the scientific methodology used to quantify emotion recognition, significantly advancing Darwin's conceptual groundwork.

Related Questions
What concept did Charles Darwin first propose regarding emotional expressions?In which 1872 publication did Charles Darwin lay the conceptual groundwork for emotion analysis?Who is most frequently credited with turning Darwin’s observations into a measurable science?Which remote population did Paul Ekman study to empirically test the universality hypothesis?What aspect of expression did the Facial Action Coding System (FACS) provide as a key contribution?What is the technical term used within FACS to catalog individual muscle movements?What analytical hurdle remains a substantial engineering challenge in automated emotion recognition?What is the relationship between FACS and an emotion-reading tool?How does the field of Emotional Intelligence (EI) differ from Ekman's focus on facial recognition?What cultural factor must contemporary analysts account for when applying universal emotion models globally?