Measuring subjective well-being is a series of pencil drawings depicting scientific models/diagrams found in literature and reports about happiness and our feelings of well-being. The research of subjective well-being is often based on so called self evaluations where the participants answer questions about their wellness, rating their answers and estimating a value for their feelings and experiences.
This specific diagram shows how a group of students have rated how important they consider money and love is for their general life satisfaction.
Reference: Culture and Subjective Well-Being by Ed Diener and Eunkook M. Suh.