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Evangelos Katsioulis, also known as Evan Cat, is a public speaker, life coach, consultant psychotherapist, and psychiatrist who lives in Thessaloniki, Greece. He is known for high scores on multiple IQ tests and is often referred to as having the world's highest IQ. In 2012, Yahoo! Finance and Business Insider featured him on its list of the smartest men in the world. Katsioulis is the founder of several societies, including the World Intelligence Network (WIN), an international organization of high IQ societies, and AAAA.GR, an organization that works detection and supporting gifted individuals in Greece. Katsioulis is also a member of some exclusive intelligence societies such as the GIGA Society.
Katsioulis is known for his high intelligence test scores. There are several reports that he has achieved the highest scores ever recorded on IQ tests designed to measure exceptional intelligence. Katsioulis has a reported IQ of 205 on the Stanford-Binet scale with a standard deviation (sd) of 16, which is equivalent to an IQ of 198.4 on the Wechsler scale with sd 15, which is equivalent to an IQ of 258 on the Cattell scale with sd 24. Statistical interpretation of these numbers estimates that Katsioulis' performance, when assuming a normal Gaussian distribution of IQ scores in the general population, is to be expected in one out of every 38,000,000,000 people.
Katsioulis attended the Aristotle University of Thessaloniki School of Medicine in 1993, completing his medical training in Psychiatry and Psychotherapy in 2000, studying in London and Thessaloniki. From 2001 until 2003, he completed an MSc in Medical Research & Technology at the School of Medicine of Aristotle University of Thessaloniki. From 2009-2012, Katsioulis completed an MA in Philosophy in the Faculty of Philosophy of the Aristotle University of Thessaloniki in 2012. At the same time, starting in 2009, he was working on a Ph.D. in Psychopharmacology, finishing in 2013.
In 1989, Katsioulis achieved the third-best performance in Thessaloniki in Greece's 1989 National Mathematics Contest. In 1993, he achieved the best-reported performance among more than 11,000 participants in the final national physics examinations in Greece.
In 2003, Katsioulis became the sixth member of the GIGA High IQ society, an exclusive society with a minimum entrance requirement of an IQ of 190 and a standard deviation of 15. This is statistically expected to be achieved by only 1 person in 1 billion. Katsioulis achieved the best performance in two of the Cerebrals Society's international Non-Verbal Cognitive Performance contests, in 2003 and 2009. Katsioulis also holds membership in more than 100 high-IQ societies and organizations.
Katsioulis has worked as a general practitioner, oncology resident, psychiatry resident, private psychiatrist, and psychotherapist.
Following his graduation from the School of Medicine of the Aristotle University of Thessaloniki, he was appointed as a General Practitioner in the Primary Health Centre of Giannades in Corfu, Greece, where he worked from 2000 to 2001.
Katsioulis was a Senior house officer in radiation oncology at the Theageneio Anti-Cancer Hospital of Thessaloniki from 2001 to 2003.
Evangelos served as a Senior house officer in Neurology at the Papageorgiou General Hospital of Thessaloniki from 2011 to 2012.
He was appointed as a Senior house officer in Psychiatry in London and worked for the Charing Cross Scheme in Psychiatry from 2005 to 2007. He completed his medical specialization in Psychiatry at the Psychiatric Hospital of Thessaloniki.
Katsioulis offers life coaching through courses available on his website. He also publishes a free weekly newsletter on life coaching and posts videos to YouTube. These include self-help tips, tools, and tactics as well as teachings, analytical explanations, science-backed strategies, practical guidance, and highly relatable real-life stories.
Katsioulis is the author of a number of articles expressing his thoughts on society, philosophy, intelligence, anxiety, depression, and modern lifestyle. Katsioulis has also written two television screenplays called ELLHNAS.COM (2008) and TI PEI; (2009). His first book is due to be published in 2023, based on his life coaching teachings.
