As science has become integrated with economic, commercial, military, political or other social
activities, it often brings up various moral, ethical, social problems related to its development.
These are generally named socioscientific issues(SSI). Current science education aims to educate
students as future citizens who are scientifically literate, and the inclusion of SSI into science
curricula has been generally regarded as an essential element to achieve this aim. However, a
considerable amount of research has reported that only a small percentage of science teachers
address SSI in the science classroom. And most science teachers still feel that their most
important task by far is to teach the principles of science, and any substantive pedagogical
changes represent a burden. The author attempted to figure out the reasons by investigating the
current state of science teachers in terms of their perception and understanding of SSI and nature
of science. As an initial step, the author asked 21 pre-service science teachers to write weekly
journals regarding 8 kinds of SSI after participating in class discussions, and identified some
decision-making patterns from their responses. The results indicated that the pre-service science
teachers showed different decision-making patterns depending on the issues, such as emotive
informal reasoning, rationalistic informal reasoning, evidence-based compromising, and
emotion-based compromising. Their decision-making patterns also represented their view of
science, and the teachers tended to have somewhat ambiguous, but positive expectation or fear
toward the advancement of science and technology. In addition, this study showed the
possibility that the teachers could expand their view of science and enhance their
decision-making skills by continuously experiencing SSI decision-making process.