How doesclassical conditioning demonstrate learning byassociation?

Classicalconditioning demonstrates learning by association as one stimulussignifies the possibility of the occurrence of another stimulus.Unconditioned stimulus and response are gradually conditioned. Forexample, in the experiment conducted by Ivan P. Pavlov on the dog, abell was rung after which food was served to the dog. After somedays, no food was served after the ringing of bell, but the dog stillsalivated to the sound of it and thus, associated the bell with thefood. The association resulted in the acquisition of the new responseby the dog, i.e. salivation to the sound of bell. In this case, thebell was a conditioned stimulus and saliva secretion was aconditioned response.

Therefore,in classical conditioning, one stimulus signifies the possibleoccurrence of another stimulus.