When Pavlov stopped giving the dogs food after the real conditioned stimulus, they stopped salivating to the sound of the ticking. This is called

An unlearned, involuntary response, such as salivating when presented with food, is

A stimulus that has no effect on the desired response is a(n) _____ stimulus.

When a previously neutral stimulus, through repeated pairing with the unconditioned stimulus, begins to cause the same kind of reflexive response, the neutral stimulus has become

For classical conditioning to be effective, the conditioned stimulus must be

Without the _____, higher-order conditioning would be difficult to maintain and would gradually fade away.

A naturally occurring stimulus that leads to an involuntary (reflex) response is a(n)

In his classical conditioning experiment, Pavlov's dogs were conditioned to salivate when they

_____ is the disappearance or weakening of a learned response following the removal or absence of the unconditioned stimulus (in classical conditioning) or the removal of a reinforcer (in operant conditioning).