Compound Stimulus = Weak
CS and Strong CS-US pairing
Weak CS=
Weak or No CR
Strong CS = CR
We pay
attention to
what is most
relevant
Conditioned Inhibition
Phase 1
Excitatory CS
elicits CR
Inhibitory CS
prevents CR
Phase 2
Pair CS+ and
CS- together
with no US
Phase 3
Present CS+
CS- elicits no CR
Early Theoretical Perspectives
Stimulus-Substitution
classical conditioning occurred
because the conditioned stimulus
became a substitute for the
unconditioned stimulus by being
paired closely together
Stimulus response
Theory is a concept in psychology that
refers to the belief that behavior
manifests as a result of the interplay
between stimulus and response.
US-Preexposure
the interference paradigm in
which acquisition of the
conditioned response is
retarded due to prior
experience with the US
Similar to habituation.
The US is important.
Support for SS Theory.
US Devaluation
Similar to habituation.
The US is important.
Support for SS Theory.
devaluation in infant rats does not permanently change the
animal’s original representation of the unconditioned
stimulus, but instead may replace it temporarily with a
conflicting representation.
Blocking
Equal presentation of T should elicit a CR
T was redundant. Causes problems for
SS Theory
Higher-order conditioning
Sensory preconditioning
Differs from Higher-order
conditioning in that the
conditioned stimuli are associated
before classical conditioning has
occurred
Like Higher-order
conditioning,
supports SR Theory