The first way we did this was, one Vancouver morning, we went out on the campus at University of British Columbia, approached people and said, "Do you want to be in an experiment?" They said, "Yes." We asked them how happy they were, and then gave them an envelope.
Primero lo hicimos así: en una mañana, en Vancouver, fuimos al campus de la Universidad de Columbia Británica y nos acercamos a la gente y les preguntamos: “¿Quieres participar en un estudio? ” Ellos dijeron:“ Sí ”. Les preguntamos qué tan felices eran,