Test 6 Flashcards
conditioned reinforcement
A stimulus or event that has the effect of
increasing or maintaining the rate of the response based on a conditioning
history.
* Involves a conditioning history of correspondence between an arbitrary
event/stimulus and presently effective reinforcer
- Conditioned reinforcer:
: An arbitrary event that is able to increase the
frequency of an operant. * Also called a secondary reinforcer (but conditioned is preferred).
Unconditioned reinforcer
A biologically relevant stimulus or event that
has a reinforcing effect without any conditioning history (food, water,
sensory stimulation).
The Behavior of Organisms
- Rats exposed to a clicking sound and then given food. * The clicking sound was then used to train lever pressing. * Each presentation of the click without food was an extinction trial for conditioned reinforcement value of the click
New-response method:
Testing the strength of a conditioned stimulus by
using it to train a new operant response. * Typically produces short-lived effects
Established-response method
The unconditioned reinforcement is
removed (placed on extinction) and conditioned reinforcement is presented
alone. The degree to which behavior is maintained is an index of the
strength of the conditioned reinforcement.
Sequential Compound schedules
- More than one schedule of reinforcement * Occur across time
- Organism has to either: * Complete ALL simple schedules to get terminal reinforcer * Chained/Tandem
- OR complete the schedule that is in effect at the time
- Mix/Multiple
- Chain and tandem (and MIX/MULT) schedules are similar EXCEPT for the presence of a separate SD
for each link in a
chain schedule and the absence of a unique SD
in tandem
schedules. * Comparing performance in equivalent chain and tandem schedules demonstrates the dual functions of the stimuli in
chain schedules: SD
and S r(cond). * I.E. responding across the similar schedules should be the same because the rate of reinforcement is the same…unless….
Chained Schedule
Two or more simple schedules of reinforcement
that occur sequentially and are signaled with an
SD
* A sequence of SDs and responses: * Each response produces the SD for the next
response
* Each SD is also a conditioned SR+ * The last response is followed by the
natural/terminal SR+. * Terminal SR+ is dependent upon completing all
simple schedules of reinforcement.
Tandem Schedule
- Two or more simple schedules of reinforcement
that occur sequentially and are NOT signaled with
an SD - Terminal SR+ is dependent upon completing all
simple schedules of reinforcement. * Set up exactly the same as a chained schedule
Except…
Delay-reduction hypothesis:
Stimuli that signal a decrease in the overall
time to reinforcement (or an increase in time to the occurrence of an
aversive) function as conditioned reinforcers. * Stimuli that signal no reduction in time to reinforcement (SΔ) or no period of
safety from an aversive event (Save) do not function as conditioned reinforcement.
VI 30, VI 90 vs VI 90 and VI 30
Three possible outcomes
* The overall rate of reinforcement is the same for
both schedules, so there should be equal responding
* Indifference
* Matching
* More reinforcement in the VI 30 terminal link, so 3X the
responses in that link
* Preference for VI 90 terminal link
* Negative reinforcement for getting out of the choice link
Generalixed conditoned reinforcement
: Any event/stimulus
associated with more than one unconditioned reinforcement
(e.g., money).
- Tokens
: A form of generalized conditioned reinforcement that
can be stored and later exchanged for other reinforcers (money,
gift cards, etc.).
- Correspondence relations:
: A special type of stimulus control where
the discriminative stimulus is a behavior of an individual and the target
response is topographically similar to the SD. * A child who observes his brother raid the cookie jar may engage in similar behavior. * Adults watch their teenagers’ dancing and repeat aspects of these
performances at a neighborhood party. *
Types of correspondence:
- Modeling
- Past and current behavior
- Private events and behavior