Sniffy Final
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Transcript of Sniffy Final
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Sniffy the Virtual RatPsych 210 Winter Lab Assignment
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Today:
1) The Experiment
2) Operant Conditioning3) The 5 Reinforcement Schedules well use
4) Steps to completing the assignment
5) Grade Determination
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The Experiment
Train Sniffy using Operant Conditioning
using campus computer program
Using 5 different Reinforcement Schedules
Analyze results to determine how choice of reinforcement
schedule affects extinction
Ultimately asking: How do different schedules of reinforcement
affect the persistence of a learnedbehavior?
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Operant Conditioning
Increases the rate of a desired
behavior by reinforcing that
behavior when it occurs
In our case, we want Sniffy tobar-press
We will reinforce with food
pellets
See Chapter 5 (B.F. Skinner) in
your textbook
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Operant Vs. Classical Conditioning
Operant (Type R):
Emphasis is on the
Response
Use reward to increase
a response
Classical (Type S):
Emphasis is on the
Stimulus
Get a stimulus to elicit
a response not
normally paired with it
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Schedules of Reinforcement-2 Main Types:
Continuous Reinforcement(CRF):
Rewarded every time
the desired behavior
occurs
Every time Sniffy
presses the bar, he will
get a food pellet
Partial Reinforcement(PRF):
Rewarded some times
when behavior occurs;
not every time
e.g. Sniffy might press
the bar 5 times and
only get rewarded
once.
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PRF Schedules-
Types:
Fixed:
Reward happens after
a setnumber ofresponses
Fixed Ratio
OR
after a setamount of
time passes
Fixed Interval
Variable:
Reward happens around
a certain average numberof responses
Variable Ratio
OR
after an averageamount
of time passes
Variable Interval
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Fixed Ratio (FR):
Set a specific number of responses
required for reward, e.g. 5
Sniffy will then get a food pellet after
he presses the bar 5 times
Real Life Example:
Salesperson having toreach a quota to getpayment
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Fixed Interval (FI):
Set a certain number of seconds
to pass before reward is given,
e.g. 10 seconds
Sniffy will be rewarded on his first
bar-press after 10 seconds passes
Real Life Example:
Employees getting a ChristmasBonus each year for hard work
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Variable Ratio (VR):
Set an average number of responsesneeded for reward, e.g. 5
Sniffy will get rewarded for about5bar-presses- maybe after 4, maybeafter 7, etc. It fluctuates around acertain number.
Real Life Example:
VLT machines rewardingrandomly (video lotteryterminal)
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Variable Interval (VI): Set a number of seconds that will
need to pass, on average, beforereward, e.g. 15 seconds
Sniffy will be rewarded when heresponds after about15 seconds-maybe after 12 seconds, 14, 18, etc.
Real Life Example:
Pop quizzes in class thathappen about everymonth or so
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The Computer Program:
My Computer
Apps on Caesar (S: )
Sniffy Folder
Double-click Sniffy Icon
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Completing the Assignment: Step 1) Observe Sniffys behaviors
Step 2) Magazine Train Sniffy
Step 3) Train on CRF schedule
Step 4) Extinguish behavior
Step 5) Observe Spontaneous Recovery and Extinguish
Step 6) Train on FR schedule and Extinguish
Step 7) Train on FI schedule and Extinguish
Step 8) Train on VR schedule and Extinguish
Step 9) Train on VI schedule and Extinguish
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Saving your Progress:
Saving properly is IMPORTANT for this lab!
THINK about what and how you are Saving each
time
Always save to your H: Drive
Manual tells you when to Save and when to Print
As you are progressing through one step, save
over the same file. So, throughout CRF training,
keep saving as CRF. Once done, do NOT
overwrite again.
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Saving your Progress: You should save and print these files as you go:
CRF (documents Steps 1-3)DO NOT SAVE OVER THIS FILE ONCE
DONE THE ORIGINAL TRAINING!
CRFext (documents Steps 1-5)*Print this*
FR (documents Step 6 Training)
FRext (documents Steps 6- Training and Extinction)*Print this*
FI, and then FIext (Step 7) -*Print this*
VR, and then VRext (Step 8) - *Print this*
VI and then VIext (Step 9) -*Print this*
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You Submit:
Assignment is due the week of April 2nd
As you go through the Steps, your manual instructs
you to record certain observations
You will use these, and Ch. 5, to answer the
questions attached at end of manual
Submit these answers, typed and in APA format
Also, submit the Records you have Printed out as an
Appendix
*See directions on this in Manual*
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Grade Determination:
Questions: 5.5%
Printed Records: 2%
Participation: 5%
Total: 12.5%
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Passing in the Lab:There will be lab every week up until:
Mar. 26th- 30th: NO LABS
Work independently if you need to catch up
Apr. 2nd-6th: NO LABS
Pass in the assignment to the Annex
My office 114F, or the Drop Box in MainHallway
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Starting Today:
Read through your manual
Start on steps 1 and 2
Observe Sniffys behavior and get him Magazine
Trained
Before you leave, save your work as CRF
Use the drop-down arrow in the Save window to
save to your H: drive