Feldman was interested in the effect of valium on rate of bar pressing by rats. He found rates of about 800 per hour in the saline-injection condition and 775 under the drug-injection condition. Only one Skinner box was used and the same assistant handled all the animals. Identify:
a. dependent variable
b. independent variable and the number of levels
c. names of the levels of the independent variable
d. a controlled extraneous variable
e. a quantitative variable

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The Answer of Feldman was interested in the effect of valium on rate of bar pressing by rats. He found rates of about 800 per hour in the saline-injection condition and 775 under the drug-injection condition. Only one Skinner box was used and the same assistant handled all the animals. Identify:
a. dependent variable
b. independent variable and the number of levels
c. names of the levels of the independent variable
d. a controlled extraneous variable
e. a quantitative variable

Feldman Was Interested in the Effect of Valium on Rate