Pioneered early research demonstrating that an association between a neutral stimulus and an automatic behavior could be learned?

Ivan Pavlon is regarded as the father of classical conditioning using dog salivation experiment in its study.

Explanation:

The research study was carried out by Ivan Petrovich Pavlov, a Russian physiologist widely recognized mainly for his work in classical conditioning. During his juvenile days, Pavlov developed intellectual thoughtfulness along with an uncommon desire which he himself said was "the instinct for research" in his own words.