in the late nineteenth century, who experimented on dogs to evaluate their "conditioned" responses, like salivation?

Ivan Pavlov

Explanation:

In 1897, Ivan Pavlov experimented on dogs by giving them food at certain times of the day. Then introducing different "signals" when food would be given. Example, He rung a bell before he fed the dogs. Then, after doing this a few times he rung the bell without feeding them. The dogs started salivating and expecting food.

6 or 2

explanation:

hope this you

but i think its 6

im not sure its either a leader of a group of congresspeople or a person from a congressmans district

sorry im not sure