Answer:
conditioned stimulus
Step-by-step explanation:
In this specific experiment, the ringing of the bell was the conditioned stimulus. This term refers to a previously neutral stimulus that has become associated with the unconditioned stimulus which ultimately triggers a conditioned response. In this experiment, the ringing of the bell (conditioned stimulus) has been associated with the meat (unconditioned stimulus) in order to cause the dogs to salivate when the bell rings (conditioned response).