Detailed Instructions: In this task, we ask you to rewrite a sentence in simple English without changing its general meaning. Essentially, you want to make the sentence easier to read by using simpler words, utilizing more straightforward sentence structures, and omitting non-essential information etc.
Problem: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 .
Solution:
The concept for which Pavlov is famous is the " conditioned reflex " he developed with his assistant Ivan Tolochinov in 1901 .