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?"
atau tidak. Cara pertama, kami ke kampus University of British Columbia, di Vancouver. Kami bertanya orang ramai, "Mahukah anda menyertai satu eksperimen?" Mereka menjawab, "Ya". Kami tanyakan tahap kebahagiaan mereka, dan