In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.
Q: The concept for which Pavlov is famous is the " conditioned reflex " he developed with his assistant Ivan Tolochinov in 1901 .
A: 
The concept for which Pavlov is famous is the " conditioned reflex " ( or in his own words the " conditional reflex " ) he developed jointly with his assistant Ivan Filippovitch Tolochinov in 1901 .