The author received his bachelor's and master's degrees in psychology from Seoul National University and studied quantitative psychology & statistics at Ohio State University in the US, receiving a doctorate and a master's degree for each field. He runs the Facebook site "Ohio Fisherman" (@buckeyestatfisher), where he shares information on statistics, scientific research methodology, and data science. Currently he works as a data scientist in the Silicon Valley where he writes essays on psychology, statistics, and data science in his spare time.