Answers to Simulations of the Rescorla-Wagner Model Acquisition ...

Overshadowing
Simulate five trials of overshadowing for both the Overshadowing and
Control Groups. Remember that the control group receives conditioning
of CS B only. Assume that k A = .3 and k B = .1 (i.e., A is more salient
than B). Assume that the associative strengths of CSs A and B are
initially 0.
Group Training Test Observe
Overshadowing AbUS b cr
Control bUS b CR
Group Experimental
Trial ΔV A V A ΔV B V B
1 0.30 .30 0.10 .10
2 .18 .48 .06 .16
3 .11 .59 .04 .20
4 .06 .65 .02 .22
5 .04 .69 .01 .23