Where do kind or sensitive (敏感的) people get their personalities? British scientists have found that it’s due not only to their upbringing (养育) and life experience, but also to their genes (基因). This finding is based on a study of 2,800 17-year-old twins. Scientists measured their sensitivity level by comparing how they were affected by different experiences. It turned out that 47 percent of this “sensitivity factor” is influenced by genetics (遗传学). This was higher than a previous study that said just 10 percent was affected.