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Psychology 3031/6016 Sample Quiz 1
Baum, Contingency, RescorlaWagner Model
In the first three items show all your work carefullydo NOT simply write down a
bunch of numbers and expect that to demonstrate your understanding.
1. The following table shows an experimental arrangement with a tone CS and a shock
UCS with conditioned suppression serving as the CR.
The values are the total
frequencies of the events in sequential time periods as in the Staddon data presented in
the handout in class.
Are the CS and UCS independent events?
Determine the P (UCS
CS) versus P (UCS~CS).
What is the s coefficient for these data?
Given that value and
the suppression plot of Gibbon, Berryman, & Thompson (1974) (handout in class),
estimate the suppression ratio with these contingencies.
SHOCK
~SHOCK
TONE
~TONE
2. Consider the following experiment: In Phase I a tone, T, (K = 0.4) and a light, L, (K =
0.4) are paired
separately
with a shock (
λ
= 90).
The pairing trials are randomly
intermixed until the asymptotic associative strength is nearly reached for each CS.
a) Show the course of conditioning according to the RescorlaWagner model for just
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 Spring '06
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 Psychology

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