What accounts for the absence of the extinction burst during the procedure in which the secondary reinforcer (the sound of the food magazine) is still presented but food is not?
a. The distraction provided by the sound of the magazine
b. The use of a continuous reinforcement schedule prior to extinction
c. The much lower rate of bar pressing that occurs once food is withheld
d. Following a bar press, in order to sniff the food hopper, Sniffy moves off the bar
d. Following a bar press, in order to sniff the food hopper, Sniffy moves off the bar
Answer feedback: The explanation for the extinction burst in Exercise 25 was that, when the magazine sound and food were no longer available, Sniffy remained on the bar, thus allowing a high rate of responding to occur. Moving to sniff the hopper in response to the magazine sound means moving off the bar, thereby reducing the rate of responding.
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a. amount of conditioning for each CS was equivalent to that for the compound CS. b. light had acquired a much larger amount of conditioning than the tone had. c. tone had acquired a much larger amount of conditioning that the light had. d. amount of conditioning for the two CSs was essentially equivalent.
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a. it is possible that the experimenter did not use a valid manipulation of the independent variable. b. it shows that the independent variable manipulation produced a change in the dependent variable. c. it shows that the dependent variable had no effect on the independent variable. d. it is possible that the effect of the independent variable occurred by chance.
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