joint paper, "Psychophysiology of Pain", a synthesis of their studies on pain, in 1909. Joteyko, along with social reformers in France and Belgium, believed that science could solve societal issues. She was a staunch feminist and believed that all fields of employment should be open to both men and women. Collaborating with Charles Henry, she sought to use scientific study and instruments to graph social phenomena and draw comparisons with biological data. By measuring and graphing, for example, physical and intellectual fatigue, Joteyko argued that military training would produce better results if limited to six months. In studies on workers, she concluded that industry could improve on efficiency and production, as well as the lives of workers, by evaluating the mental and physical fatigue factors involved in various tasks. She suggested basing pay on the effort required to accomplish a job, as a means of equalizing wages for various tasks, rather than basing pay on factors like gender. These studies led her to investigations on children and how educational facilities could apply scientific methods to improve and optimize the potential of their students. In 1911, Joteyko organized and chaired an international Paedological Congress hosted in Brussels. The following year, she founded and developed the curricula for the International Paedological Faculty of Brussels. Kipiani came to work at the Faculty as a laboratory assistant. Learning of the work Joteyko was doing, Maria Grzegorzewska came to Brussels to study in 1913. Joteyko, who led the Faculty until World War I broke out, became a mentor to Grzegorzewska and was a significant influence on her scientific development. The two women developed a special friendship of mutual admiration and respect for each other and would remain life-long companions. The war interrupted her ability to continue with research and she turned instead to humanitarian work. Though she founded the Committee of Assistance for Poles Residing in Belgium, Joteyko left the country in 1915. She first joined Grzegorzewska in London and the two soon migrated together to Paris. In 1916, Joteyko was appointed as the guest chair of the Collège de France. Her appointment marked the first time a woman had been allowed to lecture at the 386-year-old institution. Her first lecture was delivered on 24 January 1916. She also began lecturing at the Sorbonne and in 1918 lectured at the University of Lyon. She was awarded the Gagner Prize in 1916 and the Bellion Prize