What is "rusalov"

Vladimir Michaelovich Rusalov (born 5 October 1939) - Russian psychologist and anthropologist who was first to develop a temperament model within the Activity-specific approach. He is best known for his work in psychology of personality, temperament and differential psychophysiology. His initial and Extended versions of Structure of Temperament Questionnaire became the most widely used test in the Russian-speaking countries in the practice of personnel selection, personality studies, educational psychology and clinical psychology in the past 20 years.