If a researcher reported for an independent-groups t test that t(18) = 2.90, p < .01, how many subjects were there in the study?
a. 18
b. 20
c. 10
d. 9
b
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Because Thorndike's cats learned gradually instead of suddenly, what did he conclude? a. The cats learned by classical conditioning, not operant conditioning. b. The cats learned by gaining an understanding of the situation
c. Learning means increased sensitivity at glutamate synapses. d. Learning means strengthening responses, not gaining insights.
When the direction of difference between the sample mean and the population mean is not specified, a two-tailed test is appropriate
Indicate whether the statement is true or false
The polarization effect in groups refers to the idea that
a. group decisions generally tend toward being more conservative than individual decisions. b. group decisions tend to take a more extreme position than individual decisions. c. group decisions usually involve a lot of compromising. d. more mature individuals in the group generally balance the opinions of the daredevils.
According to the text, when a pregnant mother becomes highly stressed a fetus may ______
develop a faster heart rate and move more frequently become very ill and sick hold their hands over their eyes, covering them suck their fingers and bite their nails